Quantity 1 Piece Color Black Material ABS Compatible Models Iphone 4S / Iphone 5 / The New Ipad Other Features Communication system: Bluetooth Ver.4.0; Transmission scheme: Spectrum frequency hopping diffusion method (FH~SS); Transmit frequency range: 2.4GHz~2.4835GHz; Communication distance: 20m (Depending on use environment); Power: CR2032 battery; Power consumption: 220mA; Operating temperature: -5C~40C; Operating time: 6 months (Depending on work environment); Frequency response: 20Hz~20KHz; Audio distortion: 0.03% Certification CE / ROHS Packing List 1 x Anti-loss device ? 1 x English user manual ? 1 x CR2032 battery