A10 TWS Space Capsule Shape Bluetooth Earphone Black 1. Pick up the automatic pairing of Bluetooth. 2. The left and right ears can be connected to the phone separaty. 3. HiFi sound , bilateral call synchronization, clear stereo. 4. Bluetooth 5.0 chip, stable signal, low power consumption, no , no stagnation. 5. Mini space warehouse magnetic charging design, easy to carry, storage will not fall. 6. Comfortable to wear, exercise and fitness can not be lost. 7. Bluetooth device compatibility, universal smart device with Bluetooth function. 8. Simple operation, one-click wake-up voice istant. Product parameters: 1. Bluetooth version: 5. 0. 2. Transmission distance: 10-20m. 3. Single headphone battery capacity: 40mAh. 4. Charging battery capacity: 400mAh. 5. Use time: 3-4 hours. 6. Charging the headset to charge the headset: 4-5 times. 7. Standby time: 200 hours. 8. Headphone charging time: about 1-2 hours. 9. Charging bin charging time: about 1-2 hours. 10. Audio transmission format: A2DP/HFP/HSP/AVRCP. 11. Frequency: 2.4-2.48 GHz. 12. Microphone sensitivity: -38dB+/-2dB. 13. Charging bin input / output power: 5V-1A. 14. Working voltage: 3.4-4.2V. Packing list: Lanyard x 1 Instruction manual x 1 Box x 1 Charging box x 1 Micro USB charging cable x 1 Bluetooth headset (pair) x 1 S earbuds (pair) x 1 M earbuds (pair) x 1 L earbuds (pair) x 1