1. True wireless stereo, HIFI sound quality; Bluetooth version 4.1, operating frequency 2.4GHZ, ultra-low power consumption.2. Both left and right ears have complete Bluetooth headset functions, which can be used alone or in pairs for listening to songs and making calls.3. Use custom-made explosion-proof steel shell rechargeable lithium battery, 85 mAh super large capacity, both ears can make phone calls continuously for 5-6 hours.4. Industry-leading Bluetooth technology, no text messages in a 30-meter circle indoors, and a continuous line in a 10-meter circle outdoors. (Under the premise of no obstruction)5. Built-in CVC6.0 intelligent noise cancellation function, clear calls; support 1 drag 2 and can connect 2 mobile phones at the same time.Comes with single ear charging compartmentSignal enhancement, battery upgrade, appearance upgrade, with battery base chargingStandby time: 15-20 daysHeadphone battery capacity: 50 mAHeadphone charging time: 1hWireless frequency: 2.402-2.480GHzCharging voltage: 5V