*Full duplex, noise and echo cancellation, DSP technology
*Bluetooth specification: 2.0
*Working Distance Range: 10 Meters(class2)
*Built-in microphone and loudspeaker.
*Voice dial & Redial.
*USB PORT: For firmware upgrade only!
*LCD Display: 12 digits caller number display, battery status icon, backlight.
*Phonebook: Bluetooth wireless download, stores up to 250 records.
*Pairing: Memorize up to 4 mobile phones simultaneously.
*It can display the name and the number when have the call
*Language: English
*Charging Time: Within 3 hours
*Talking Time: Up to 10 hours
*Standby Time: Up to 150 hours
*Rechargeable Battery: Lithium-ion, 3.6V, 400mAh installed
*Battery Protection: Over charge and over discharge protection
*Input Current: 350 mA (internal controlled)
*Input Voltage: DC 5V
*Speaker Power: 2W (max)
*Speaker Impedance: 4 ohm
*Sensitivity of Microphone: -48dB.