Size: 50x35x10mm=1.97" x 1.38" x 0.40"
Mateial: ABS+ PS plastic
Batteries: 2 x AG3 button cell batteries (included)

Color:whtie/black or customed;
Attachment: 25mm metal keyring;
Logo:customed logo printing on one location(silk printing);

Complied with CE and ROHS;
Packing:polybay+ white box packing or blister card packing;

With plastic insulator between batteries,pull out this before use;
Key-finder function: It will flash with red LED and beep intermediately when you whistle and finds your keys back;