I7s Binaural Wireless Bluetooth Headset TWS Earphone with Charging Bin Plating <ul class=productAttributesList><li><span>Line Length:<span><span>None<span><li><li><span>With Microphone:<span><span>Yes<span><li><li><span>Wireless Type:<span><span>bluetooth<span><li><li><span>Connectors:<span><span>None<span><li><li><span>Waterproof:<span><span>No<span><li><li><span>Communication:<span><span>Wireless<span><li><li><span>Active Noise-Cancellation:<span><span>Yes<span><li><li><span>Support Memory Card:<span><span>No<span><li><li><span>Volume Control:<span><span>Yes<span><li><li><span>Control Button:<span><span>No<span><li><li><span>Is wireless:<span><span>Yes<span><li><li><span>Support APP:<span><span>No<span><li><li><span>Sensitivity:<span><span>118dB<span><li><li><span>Style:<span><span>Ear Hook<span><li><li><span>Vocalism Principle:<span><span>Balanced Armature<span><li><ul><div>Features Bluetooth version: EDRV4.2 Voice: Support Support Protocol: HFP HSP A2DP AVRCP Function: answering calls, hanging up call registration, hanging up, listening to music pauseplay, voice report, tail number redial, caller number, smart voice prompt, power display, noise reduction Battery capacity: left and right ears: 55mAh, base 300mAh Charging power supply: AC input 110-240V DC output 5V Transmission power: Class2 Wireless frequency: 2.402-2.480GHz Call duration: 2-3 hours or so Music playback: 2-3 hours or so Charging time: 60 minutes Noise Reduction: DSP Intelligent Noise Cancellation Technology Operating range: 15 meters effective distance Charging interface: Micro-USB Charging instructions: Headphone charging indicator: when the headphone is charging, the red light is on. When the red light is off, it is full charged.<div>