WIWU Open Ear Headphones Wireless Earbuds Fast Charging Headphone Noise Cancelling Earphones with Ergonomic Earhook Waterproof Ear Buds for Running Workout

Packing size (cm): 16913755mmProduct weight (kg): 0.3KGChip: RTL8753EFEBluetooth version: V5.3Bluetooth audio decoding: SBC, ACCBluetooth distance: ≥15m (in an empty environment)Low latency: 60msControl method: touch buttonSpeaker: φ16.2mm speaker, impedance 18Ω±15%ohm; sensitivity 129.11 dB±3dBFrequency response range: 20-20KHzMicrophone: YixinweiBattery: 2*55mAh for headphones. Charging case: 500mAhCharging port: Type-CCharging time: 0.5h for headphones, 2h for charging caseWorking time: 10 hours of continuous listening to music (at 70% volume), chargingcase can provide 3.5 times of battery life, total about 30h