Features: 1) Using the latest CSR chipset, high fidelity and stereo sound which brings excellent audio performance, elegant and pure tamber. 2) Listen to your favorite MP3 Music stored in most of the mobile phones which possess stereo Bluetooth chipset. 3) Listen to the music from computers in stereo with the support of bluetooth USB dongle. The outer speaker can support Skype talk. (the ideal laptop accessories in 21 century) 4) supporting connecting with several Bluetooth devices which switch audio to mobile phone automatically when you are listening to music, never missing any call. It will switch back to player when call ends. 5) Adjustable headband and pillow-soft ear cushions for superior fit and wearing comfort 6) High capacity Li polymer rechargeable battery in side, the talking time and playing time can reach 18 hours and 15 hours respectively. 7) Standby time can be prolonged at OFF when FJ-800 is off-work Specifications: 1) Technology: Bluetooth V2.0 CSR 2) Chipset: CSR-BC3 3) Remote pick-up and hang-up with 10 meters (no solid obstacle) working distance range 4) Frequency band: 2.40GHz ~ 2.48GHz 5) Talk time: up to 18 hours 6) Play time: up to 15 hours 7) Standby time: up to 220 hours 8) Weight: about 99g 9) Battery: rechargeable Li-Polymer battery Charging time:2-4 hours 10) Operate/storage temperature: -20~60 degree Charge temperature: 0~45degree