Description:9D surround sound, 5.0 binaural chip, large capacity, real wireless Bluetooth headset.Graphene bass diaphragm, HIFI high-frequency technology, 10mm dynamic speaker unit.Two connection methods: single/double free use, single ear listening, exclusive, listeningBoth ears can hear HiFi stereo.Dual ear high-definition call, 5.0 automatic start pairing, CVC8.0 built-in active noise reduction IC.It has dual ear high-definition calls, pause playback, answer hang up, summon Siri, volume adjustment, up andSwitch down to songs, automatically start, automatically pair, intelligent noise reduction, no game delay. Specifications:Color: black, white, pink (optional)Transmission range: 10 metersCharging voltage: DC 5VMicrophone sensitivity: -42dBWorking temperature: -10-50 CFrequency response range: 20-20000HzSensitivity: 120dB+/-5dBTransmission distance: 10mCharging time: approximately 1 hour Package includes: 1 * Bluetooth earphones Attention: 1. Due to manual measurement, please allow for minor errors. Please ensure that you do not mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your shipping information (such as name, street, house number, doorbell/email without a name, etc.) is incorrect, the order will not be delivered correctly.