1) Frequency: 2. 4GHz-2. 4835GHz ISM spectrums 2) Profiles: Headset and hands free 3) Output power class: Class 2 4) Battery: Rechargeable lithium polymer 5) Battery voltage: 3. 7V DC 120mAh 6) DC power input: 5. 0V DC 100~240V AC adapter 7) Talk time: Up to 6 hours 8) Standby time: Up to 200 hours 9) Nominal charging time: Within 2 hours