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 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 1.2cm Receiver: 4.8 x 3.2 x 0.7cm Material: ABS Weight: Approximately 150g Batteries: Transmitter/Receiver - CR2032 button battery