Anti-lost and searching function Protect your kid or pet from losing Prevent mobile phone, purse or luggage being stolen mitter:Put on the protected object Receiver:Carry with yourself or the host Functions: 1.Anti-lost function: Receiver will alarm and vibrate when the protected object walks out of the setting distance. 2.Searching function: Turn the switch on receiver to S-ON. When the mitter is within the setting distance, the receiver receives the signal and alarms with vibrating when approaching the mitter; when the mitter is out of the range of the setting distance, LED on the receiver will not flash and no alarms sent out. mitter battery: 1 x CR2032 (included) Receiver battery: 1 x AAA battery (Not included) Colour:black Material:plastic Package Contents: 1 x Receiver 1 x mitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.