Invisible Sleep Bluetooth Wireless Headphones Earphone In-Ear Earbuds WaterproofPremium Quality100% brand new and high-quality made. Bluetooth 5.3Wireless high-performance earphones with stable Bluetooth 5.3 connection.ComfortableDesigned to be mini and light, they are suitable for long-time wearing and will not cause any discomfortConvenientEquipped with touch control, you can easily switch between pausing music, answering calls, rejecting calls, or tracking music with the touch of a finger.Long BatteryUp to 7 hours of listening and talk time (more than 25 hours with charging case).Water ResistanceeReinforced design for sweat & IPX4 water resistance. Specifications: Bluetooth Version: 5.3Bluetooth Protocol: HFP1.7,1.2, A2DP1.3, AVRCP1.6, SPP1.2 and PBAP1.2, BDR/BLESound quality: HIFITransmission Distance: 10MRated Power: 50mWPower Amplifier Type: Chip built-inReceive Sensitivity: 120dBImpedance: 32Frequency Response: 20-20KHzCharging Case: 300mAh, 3.7VCharging Time (h): About 2 hoursEndurance Time: about 4-8 hoursCharging Criteria: With Charging CaseCharging interface: Type-c interfacePower supply voltage: 5V2A Pairing instructions:1. Product activation the headset into the electrical compartment charging can be activated2. pairing method, activate the headset, open the mobile phone Bluetooth, mobile phone Bluetooth automatically search, see the device click on the pairing, after the success can be used normally3. If you need to pair different electronic devices separately, please activate a headset first, the same way pairing, after the successful closure of the headset and electronic devices Bluetooth, and then activate the need to pair the headset, and equipment to open the Bluetooth, after successful pairing, and can be used