Open Comfortable Hanging Ear OWS Bluetooth Earphones 1. Bluetooth programme: AB5656T3 2. Support Bluetooth protocol: A2DPAVDTPAVRCPRFCOMMHFPHSPSPPHID 3. Bluetooth version: V5.4 4. Frequency range: 2.402GHz-2.480GHz 5. Transmission distance (barrier-free): about 10m 6. Speaker impedance: 16 ohm 14.2mm 7. Speaker output power: 5mW 8. Sensitivity: 119dB 9. Frequency range: 20HZ-20KHZ 10. Signal-to-noise ratio: greater than 90dB 11. Battery capacity: single earphone: 50mAh; charging case: 300mAh 12. Use time: about 4-5.5h 13. Standby time: about 120h 14. Charging voltage: DC 5V 1A 15. Charging time: about 1h 16. Charging case size: about 6.8 x 8 x 2.7cm Features: 1. 14.2mm large moving coil, CD-grade lossless sound quality, graphene diaphragm, high-fidelity moving coil unit, bass-heavy bio-diaphragm 2. Ergonomic ear design, airy and soft to wear, outdoor sports running without falling off 3. 360-degree ultra-clear surround sound, enjoy the panoramic space sound effect 4. Noise-cancelling ultra-high-definition calls, improve clarity and fidelity 5. Synchronised audio and video for a more immersive gaming experience 6. Bluetooth 5.4 chip, high compatibility, anti-interference ability, more stable 7. Automatic boot back to the connection, single and double ear mode can be seamlessly switched without disconnection 8. Intelligent digital display charging compartment, remaining power at a glance 9. Easy operation, sensitive induction