JOYROOM JR-OE1 Waterproof True Wireless Noise Reduction Bluetooth Earphone1 Open Ear Design: Redesigned streamlined structure that adapts to ear contour 2 Stable To Wear Without Falling Off: Made of high elastic liquid silicone material 3 Long Endurance: Adopting ultra-low power chips and high-quality batteries 4 DT3 0 Directional Transmission: Adaptive directional sound transmission technology, no leakage 5 16 2MM Large Dynamic Coil: Built in driver unit and digital sound enhancement algorithm 6 IPX5 Waterproof And Sweatproof: Fearless of harsh weather or intense exercise, sweating and rain 7 Bluetooth 5 3 Link Stability: High performance and low-power Bluetooth chip, more stable 8 Specifications: - Bluetooth version: V5 3 - Bluetooth distance: 10M - Music duration: about 18 hours (70% volume) - Call duration: about 12 hours (70% volume) - Headphone battery capacity: 100mAh - Charging box battery capacity: 600mAh - Headphone charging time: about 1 5 hours - Charging time of the charging box: about 1 5 hours - The charging box can charge the headphones: about 2-3 times - Charging interface of charging box: Type-C - Charging box power input: 5V 1A - Material: ABS+silicone