Features: 1) Full duplex, noise and cancellation, DSP technology 2) Bluetooth specification: 1.2 3) Built-in microphone and loudspeaker 4) Super bright LED display panel for incoming call indication 5) Voice dial and redial 6) Record important information during conversation 7) Wireless headset convenient for private conversation 8) Switch to car kit and speaker easily 9) High capacity Li battery, standby time: one week 10) Dimensions: 28cm x 9.5cm x 1.9cm 11) Weight: 379.2g/pc 12) Battery: chargeable Li battery 13) Color: silver