JOYROOM JR-DB2 Jdots Series True Wireless Bluetooth EarphonesFeatures1. Compact size, comfortable to wear and does not press against the ears2. PU composite diaphragm acoustic technology, high sound fidelity and more balanced frequency3. Intelligent high-definition digital display can display the power of the earphones and charging box in real time4. Using Bluetooth 5. 3 chip, low power consumption, faster and more stable connection5. DNS call enhancement, accurate voice pickup, elimination of environmental noise, clear sound quality6. Low latency technology, audio and video synchronization, 65ms low latency7. Widely compatible with Android, iOS and Windows systems, easy to useParameters- Bluetooth chip: JL-AD6973D4- Bluetooth version: V5. 3- Bluetooth audio decoding: AAC, SBC- Supported protocols: HSP, HFP, A2DP, AVRCP- Working frequency: 2402-2480KHz- Headphone battery capacity: 35mAh- Shell battery capacity: 500mAh- Speaker impedance: 16 ohms- Rated power: 2 x 3mW- Speaker: 6mm- Music time: 7H (70% volume)- Total play time: 42H (70% volume)- Talk time: 5H (70% volume)- Headphone standby time: about 48 hours- Headphone charging input: 5V 200mA- Shell charging input: 5V 1A-Charging input interface: Type-C-Number of cycles:: about 5 times- Headphone charging time: about 1. 5H-Charging time of charging box: about 1. 5H- Waterproof rating: IP54- Material: ABS+PC- Headphone weight: 3g