Attach it to items like your remote control, keys, wallet, glasses, or cane, and you can easily find them. When you press the button on the transmitter that matches the color of the receiver attached to the item you're looking for, a loud beep will sound and the LED lamp will flash, immediately letting you know where it is. Product Contents: Transmitter x 1, Receiver x 6, Transmitter stand x 1, Button batteries x 7 Size: Transmitter: 10 x 3.5 x 1.2 cm Receiver: 4.8 x 3.2 x 0.7 cm Material: ABS Weight: Approximately 150g Batteries: Transmitter/Receiver - CR2032 button battery