diff --git a/api/core/GetDevicesFrom.go b/api/core/GetDevicesFrom.go
new file mode 100644
index 0000000..8d06b6f
--- /dev/null
+++ b/api/core/GetDevicesFrom.go
@@ -0,0 +1,24 @@
+package core
+
+import (
+	"github.com/bandev/lux/api/general"
+	"github.com/bandev/lux/commands/devices"
+	"github.com/fatih/color"
+	"os"
+	"strconv"
+)
+
+func GetDevicesFrom(arg string, c general.Connection) []devices.Device {
+	var ds devices.Devices
+	ds.Get(c)
+	if arg == "@a" {
+		return ds.Data.Devices
+	} else {
+		var dID, _ = strconv.Atoi(arg)
+		if len(ds.Data.Devices) <= dID || dID < 0 {
+			general.PrintHeading("Device id provided is invalid", color.FgRed)
+			os.Exit(1)
+		}
+		return []devices.Device{ds.Data.Devices[dID]}
+	}
+}
\ No newline at end of file
diff --git a/commands/brightness/Entry.go b/commands/brightness/Entry.go
index 6d754a9..6323ac9 100644
--- a/commands/brightness/Entry.go
+++ b/commands/brightness/Entry.go
@@ -21,9 +21,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 package brightness
 
 import (
+	"github.com/bandev/lux/api/core"
 	"github.com/bandev/lux/api/general"
 	"github.com/bandev/lux/api/keymanager"
-	"github.com/bandev/lux/commands/devices"
 	"github.com/fatih/color"
 	"strconv"
 )
@@ -44,24 +44,11 @@ func Entry(args []string) {
 		return
 	}
 
-	// Determine the device id from the args
-	var dID, _ = strconv.Atoi(args[2])
-
 	// Create a new connection struct
 	var c general.Connection
 	c.Key = keymanager.GetAPIKey()
 	c.Base = "https://developer-api.govee.com/"
 
-	// Get a list of devices owned by the user
-	var ds devices.Devices
-	ds.Get(c)
-
-	// Check dId provided is valid
-	if len(ds.Data.Devices) <= dID || dID < 0 {
-		general.PrintHeading("Device id provided is invalid. E.g. lux brightness 0 50", color.FgRed)
-		return
-	}
-
 	// Find the power
 	var power, err = strconv.Atoi(args[3])
 	if err != nil {
@@ -75,19 +62,19 @@ func Entry(args []string) {
 		return
 	}
 
-	// Find the device
-	var d = ds.Data.Devices[dID]
-
-	// Create control and response structs
-	// & send the data.
-	var control Control
-	var response Response
-	response.Fill(control.Send(d, c, power))
-
-	// Output data afterwards
-	general.PrintHeading("BRIGHTNESS " + args[2] + " " + args[3] + "%", color.FgWhite)
-	general.PrintStringParagraph("brightness", strconv.Itoa(power) + "%", color.FgWhite)
-	general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	// For each device
+	for i, d := range core.GetDevicesFrom(args[2], c) {
+		// Create control and response structs
+		// & send the data.
+		var control Control
+		var response Response
+		response.Fill(control.Send(d, c, power))
+
+		// Output data afterwards
+		general.PrintHeading("BRIGHTNESS " + strconv.Itoa(i) + " " + args[3] + "%", color.FgWhite)
+		general.PrintStringParagraph("brightness", strconv.Itoa(power) + "%", color.FgWhite)
+		general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	}
 }
 
 
diff --git a/commands/color/Entry.go b/commands/color/Entry.go
index 547765f..69ded0d 100644
--- a/commands/color/Entry.go
+++ b/commands/color/Entry.go
@@ -21,9 +21,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 package color
 
 import (
+	"github.com/bandev/lux/api/core"
 	"github.com/bandev/lux/api/general"
 	"github.com/bandev/lux/api/keymanager"
-	"github.com/bandev/lux/commands/devices"
 	"github.com/fatih/color"
 	"strconv"
 	"strings"
@@ -45,25 +45,11 @@ func Entry(args []string) {
 		return
 	}
 
-	// Determine the device id from the args
-	var dID, _ = strconv.Atoi(args[2])
-
 	// Create a new connection struct
 	var c general.Connection
 	c.Key = keymanager.GetAPIKey()
 	c.Base = "https://developer-api.govee.com/"
 
-
-	// Get a list of devices owned by the user
-	var ds devices.Devices
-	ds.Get(c)
-
-	// Check dId provided is valid
-	if len(ds.Data.Devices) <= dID || dID < 0 {
-		general.PrintHeading("Device id provided is invalid. E.g. lux color 0 #0067f4", color.FgRed)
-		return
-	}
-
 	// Check for hexadecimal colour codes
 	var hex = args[3]
 	var colour ControlCmdColor
@@ -78,20 +64,19 @@ func Entry(args []string) {
 		return
 	}
 
-
-	// Find the device
-	var d = ds.Data.Devices[dID]
-
-	// Create control and response structs
-	// & send the data.
-	var control Control
-	var response Response
-	response.Fill(control.Send(d, c, colour))
-
-	// Output data afterwards
-	general.PrintHeading("COLOR " + args[2] + " " + strings.ToUpper(args[3]), color.FgWhite)
-	general.PrintStringParagraph("colour", args[3], color.FgWhite)
-	general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	// For each device
+	for i, d := range core.GetDevicesFrom(args[2], c) {
+		// Create control and response structs
+		// & send the data.
+		var control Control
+		var response Response
+		response.Fill(control.Send(d, c, colour))
+
+		// Output data afterwards
+		general.PrintHeading("COLOR " + strconv.Itoa(i) + " " + strings.ToUpper(args[3]), color.FgWhite)
+		general.PrintStringParagraph("colour", args[3], color.FgWhite)
+		general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	}
 }
 
 
diff --git a/commands/query/Entry.go b/commands/query/Entry.go
index 9e85e1d..2ecae26 100644
--- a/commands/query/Entry.go
+++ b/commands/query/Entry.go
@@ -21,9 +21,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 package query
 
 import (
+	"github.com/bandev/lux/api/core"
 	"github.com/bandev/lux/api/general"
 	"github.com/bandev/lux/api/keymanager"
-	"github.com/bandev/lux/commands/devices"
 	"github.com/fatih/color"
 	"strconv"
 )
@@ -40,37 +40,22 @@ func Entry(args []string) {
 		return
 	}
 
-	// Determine the device id from the args
-	var dID, _ = strconv.Atoi(args[2])
-
 	// Create a new connection struct
 	var c general.Connection
 	c.Key = keymanager.GetAPIKey()
 	c.Base = "https://developer-api.govee.com/"
 
-	// Get a list of devices owned by the user
-	var ds devices.Devices
-	ds.Get(c)
-
-	// Check dId provided is valid
-	if len(ds.Data.Devices) <= dID || dID < 0 {
-		general.PrintHeading("Device id provided is invalid", color.FgRed)
-		return
+	for i, d := range core.GetDevicesFrom(args[2], c) {
+		// Generate and parse the query
+		var q Query
+		q.Fill(c, d)
+		// Print query to screen
+		general.PrintHeading("QUERY "+strconv.Itoa(i), color.FgWhite)
+		general.PrintStringParagraph("Device:", q.Device, color.FgWhite)
+		general.PrintStringParagraph("Model:", q.Model, color.FgWhite)
+		general.PrintBoolParagraph("Online:", color.FgWhite, q.Online)
+		general.PrintBoolParagraph("Power:", color.FgWhite, q.Power)
+		general.PrintStringParagraph("Brightness:", strconv.Itoa(int(q.Brightness))+"%", color.FgWhite)
+		general.PrintStringParagraph("Colour:", q.Colour.ToString(), color.FgWhite)
 	}
-
-	// Find the device
-	var d = ds.Data.Devices[dID]
-
-	// Generate and parse the query
-	var q Query
-	q.Fill(c, d)
-
-	// Print query to screen
-	general.PrintHeading("QUERY RESULTS", color.FgWhite)
-	general.PrintStringParagraph("Device:", q.Device, color.FgWhite)
-	general.PrintStringParagraph("Model:", q.Model, color.FgWhite)
-	general.PrintBoolParagraph("Online:", color.FgWhite, q.Online)
-	general.PrintBoolParagraph("Power:", color.FgWhite, q.Power)
-	general.PrintStringParagraph("Brightness:", strconv.Itoa(int(q.Brightness)) + "%", color.FgWhite)
-	general.PrintStringParagraph("Colour:", q.Colour.ToString(), color.FgWhite)
 }
diff --git a/commands/turn/Entry.go b/commands/turn/Entry.go
index 367629d..7bfe9cb 100644
--- a/commands/turn/Entry.go
+++ b/commands/turn/Entry.go
@@ -21,9 +21,9 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 package turn
 
 import (
+	"github.com/bandev/lux/api/core"
 	"github.com/bandev/lux/api/general"
 	"github.com/bandev/lux/api/keymanager"
-	"github.com/bandev/lux/commands/devices"
 	"github.com/fatih/color"
 	"strconv"
 	"strings"
@@ -45,40 +45,27 @@ func Entry(args []string) {
 		return
 	}
 
-	// Determine the device id from the args
-	var dID, _ = strconv.Atoi(args[2])
-
 	// Create a new connection struct
 	var c general.Connection
 	c.Key = keymanager.GetAPIKey()
 	c.Base = "https://developer-api.govee.com/"
 
-	// Get a list of devices owned by the user
-	var ds devices.Devices
-	ds.Get(c)
-
-	// Check dId provided is valid
-	if len(ds.Data.Devices) <= dID || dID < 0 {
-		general.PrintHeading("Device id provided is invalid", color.FgRed)
-		return
-	}
-
 	// Find the command
 	var cmd = general.StringToBool(args[3])
 
-	// Find the device
-	var d = ds.Data.Devices[dID]
-
-	// Create control and response structs
-	// & send the data.
-	var control Control
-	var response Response
-	response.Fill(control.Send(d, c, cmd))
-
-	// Output data afterwards
-	general.PrintHeading("TURN " + args[2] + " " + strings.ToUpper(args[3]), color.FgWhite)
-	general.PrintBoolParagraph("power", color.FgWhite, cmd)
-	general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	// For each device
+	for i, d := range core.GetDevicesFrom(args[2], c) {
+		// Create control and response structs
+		// & send the data.
+		var control Control
+		var response Response
+		response.Fill(control.Send(d, c, cmd))
+
+		// Output data afterwards
+		general.PrintHeading("TURN " + strconv.Itoa(i) + " " + strings.ToUpper(args[3]), color.FgWhite)
+		general.PrintBoolParagraph("power", color.FgWhite, cmd)
+		general.PrintStringParagraph("transaction", response.Message, color.FgWhite)
+	}
 }