MYLAPS RC4 Pro Direct Powered Personal Transponder (Black) AIT10R147
The shorter 8cm/3.15" cable allows a great fit, and the complete system weighs only 3 grams! Specs: Size: 16.25x18x4.25 mm Weight: 3 Grams Wire Length: 8 cm Color: Black Nitro Resistant Holder: Double Sided Tape Compatible with RC4 Decoder.