JOYROOM JR-D8 Neckband Wireless Bluetooth Sports Outdoor Earphone 1. 14.2mm dynamic Driver: PU composite diaphragm acoustic technology, powerful bass 2. 30Hrs Playtime: A single charge delivers days of listening 3. Dual Connection: supports connecting to 2 devices wirelessly 4. Low latency technology: sound and picture in sync, 65ms low latency 5. AI-Enhanced Clear Calls: An AI algorithm ensure that your voice is always heard clearly on calls 6. Magnetic Design: Built-in magnets clasp the earpieces together for easy carrying and wearing 7. Bluetooth 5.4: Higher anti-interference capability, lower consumption 8. Tilt design and Long-lasting Comfort: Snug fit, more comfortable to wear 9. IP54 Water Resistant: IP54 waterproof rating, withstands rain and sweat 10. Parameters: Paired name: Joyroom D8 Wearing style: half-in ear Chip: JL7003F4 Bluetooth version: V5.4 Audio decoding: AAC, SBC Supported protocols: HFP, A2DP, AVRCP Working frequency: 2402MHz-2480MHz Frequency response range: 20Hz-20KHz Battery capacity: 170mAh Speaker: 14.2mm Music time: about 30h (70% volume) Calling time: about 24h (70% volume) Standby time (connected): about 80h Power input: 5V 1A charging port: Type-C Charging time: about 2h waterproof: IP54 Material: ABS+PC Net weight: 20g