Features: 1) No wires, no limits, Bluetooth TM wireless technology 2) Stylish and comfortable design 3) True freedom to talk wirelessly in office or in car 4) Easy one-touch operation 5) Noise reduction, echo elimination 6) Volume adjustable, mute function 7) L/R ear wearable 8) Also can connect with other Bluetooth TM devices, e.g. PDAs, Laptops 9) Security: encrypted link 10) Weight: 16 grams 11) Range: up to 10 meters 12) Bluetooth 1.1 specification 13) Talk-time: 4~5 hours 14) Standby time: 128 hours 15) Selectable colors Newly-increased functions: 1) Super strong stereo 2) Chargeable on both sides 3) Ear hook can be inserted in both sides, suitable for anyone with different listening habits 4) Outside handing type battery can be easily assembled and changed Model compatibility list (for BTK-11): Nokia: 3600, 3620, 3650, 3660, 6210, 6230, 6260, 6310, 6310i, 6620, 6630, 6650, 6600,6810, 6820, 7600, 7610, 7710, 8910, 8910i, 9500, N-Gage Sony-Ericsson: P800, P802, R520m, R520mc, T39, T39m, T39mc, T60ds, T610, T616, T618,T628, T630, T61d, T61LX, T68, T68I, T68m, T68mc, T71X, Z1010, Z600, Z608, F500i,K700i, S700, P900 Motorola: A630, A820, A830, A835, A840, A760, A768, A920, A925, T260c, T270, T270c,T280I, V500, V525, V600, V880, E390, V80, C975, E398, E680, MPX100, MPX220, V1000,E1000, A1000 Samsung: SEC-X2500, SEC-X7700, SGH-X410, SGH-X400, Watch Phone, i250 Siemens: S55, S56, S57, S65, SX1, U10, U15 Philips: Fisio 820, 825, 826, 830 NEC: C616, E516, E616, E808 Panasonic: X11, X70, X700, X88 LG: TM910, 610B, U8110, U8150, MT3300 BENQ: P30, P31, P50 Sharp: GX30, SHZ105, SHZ101V O2: Xda II, O2 Xphone SK Teletech: IM-6200 VK Mobile: VG400 Accessories: user manual, ear hook, travel charger 110-240V, car charger