Features: 1) Compatible with all mobile phones without antennas 2) Flashes on GSM/TDMA mobile phones when there is an incoming or outgoing call 3) Doe not require any batteries 4) Custom logo and imprint can be printed on the flash sticker 5) There are more than 100 designs available 6) We can manufacture this product according to clients\'\' specifications 7) Available LED colors: red, yellow, blue, green and white 8) Size: 27 x 11mm Inner packing: OPP bag, paper card Outer packing: 5,000pcs/ctn Carton dimensions: 51 x 34 x 32cm Weight: 11.5kg