Remind losing or theft Environmentfriendly, without radiation Search function Ring + vibration Sleek, compact, easy to carry User can freely safe distance within a wide range( 0-25m, vary with the objects to be pratected) Transmitter:24.5(D)x7(T)mm, Weight:6.5g, Battery:CR3032x1 Receiver:60(H)x36(W)x15(D)mm, Weight:35.5g, Battery:7#x1 20pcs/inner box, giftbox: 17.3x15.3x20.4cm 10 inner boxes/ctn, Carton: 787x36x22cm