Features: 1, the latest Bluetooth version: V3.0 2, support for Bluetooth phone to play music in stereo handsfree 3, wireless range up to 10 meters 4, support Hands-Free, Headset Bluetooth protocol specification, etc. 5, memory up to 8 Bluetooth phone pairing. (Unique technology enables Bluetooth to play music) 6, built-in DSP noise suppression and echo cancellation (especially noise reduction allows you to open the windows at high speeds under 120 yards but also clearly call!) 7, the operating frequency range: ISM band (2.4 ~ 2.48GHZ) 8, equipped with hi-2W speakers, and high-sensitivity microphone 9, Battery Type: Li-ion, 3.7v, 650mah (BL-5B) Specifications: Bluetooth version:V 3.0 Support bluetooth to play music stereo Wifi range:up to 10m Support handsfree and headset and other bluetooth protocol Max memory of 8 pairs of bluetooth mobile phones Built-in DSP noise suppression and echo cancellation function (Special noise reduction processing ensures clear call when window is opened on highway with 120 yards) Working frequency range:ISM(2.4~2.48GHz) Hifi 2W loudspeaker and high sensitivity microphone Battery kind:lithium battery 3.7V 650mah(BL-5B) Call time:15~16 hours Standby time:up to 1000 hours Charge time:2~3 hours Working temperature:-40~40C Dimension:120*190*30mm Weight:152g Material:ABS Color:Black key word:car MP3,vehicle-mounted MP3,car bluetooth handsfree kit,FM transmitter,ABS