Product Description Frequency:.4GHz-2.4835GHz, ISM band Talk/Standby Time:Up to 9 hours/300 hours Supporting profile headset and handsfree Connection peer to peer Data encryption:128 bits Power Source: inlaid quality rechargeable ithium battery, 5V DC, 100 ~ 240V AC adapter Net Weight: 15.1g Dimensions: 61 x33 x 10mm(one of slimmest Bluetooth in the market) Others: compact charging Socket is attached Trademark: Eintrasse Model: MB7C Standard: CE/FCC