<p>Bluetooth distance: 10 meters without barriers</p> <p>Frequency response: 20-20000Hz</p> <p>With A2DP\/AVRCP high-quality stereo audio transmission and remote control protocol</p> <p>Charging time is about 2 hours (power indicator charging: red light is on, full charge: red light is off (blue light is on).)</p> <p>The talk time is about 8-10 hours</p> <p>Music time is about 8-10 hours</p> <p>Standby time is about 120 hours</p> <p>Battery capacity 250MAH+ protection board</p> <p>Charging power supply: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger)</p> <p>Compatible mobile phones: Compatible with 99% of mobile phones with Bluetooth function on Android, , and Symbian systems</p> <p>Impedance: 32 OHM</p> <p>Bluetooth version: Bluetooth v5.0</p> <p>Bluetooth use frequency band: 2.4GHz</p> <p>Power level: CLASS II</p> <p>Colour:blue</p> <p>Material:ABS</p> <p>Size:16 x 13 x 8.5cm</p> <p>Package Contents:</p> <p>1 x Bluetooth headset</p> <p>1 x audio cable</p> <p>1 x charging cable</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>