①. Newest Bluetooth version: V4.2+EDR ②. Operating frequency range: ISM (2.4-2.48GHZ); Bluetooth connecting within 10 meters; Incoming Call Number Readout ③. Support Hands-Free, Headset, AVRCP Bluetooth agreement standard ④. Support connecting two mobiles at the same time (choosable), max keep a record 8 mobiles ⑤. Build-in DSP noise suppression and echo cancellation function ⑥. Equip with 2W loudspeaker, high sensitivity microphone ⑦. Talk time up to 10 hours/Standby time up to 500 H; Charging time approximately 2 H ⑧. Digital sound enhancement via DSP technology; Noise cancellation through DSP; Echo cancellation through DSP ⑨. A2DP (Advanced Audio Distribution Profile) for transmitting music, pod casts and directions from a GPS app on your phone ⑩. SP09 Status Light (ready-to-pair, call status, connection status) ⑪. Size: H100 x W60 x D21 mm; Weight 57 grams ⑫. Operating range up to 10 meters (approximately 33 feet) ⑬. Supported Bluetooth profiles: HFP, HSP, A2DP ⑭. Bluetooth specification version 4.2+EDR ⑮. Build-in digital amplifier for audio quality enhancement ⑯. Rechargeable battery with charging option from car charger or USB cable