Details:
1. Bluetooth version: Bluetooth V5.1
2. Support Bluetooth protocol: AVRCP V1.6.A2DP V1.3.HFP V1.7 Simultaneous LE and BR / EDR
3. Bluetooth operating frequency: 2.402GHz-2.480GHz
4. Receiving sensitivity: -85dBm
5. Bluetooth effective distance: less than 10 meters
6. Speaker power: Rating 3mW
7. Headphone amplifier type: chip built-in
8. Audio signal-to-noise ratio: greater than 90dB
9. Frequency response: 50Hz～20KHz
10. Battery box: Lithium battery 3.7V, 400mAh
11. Music time: about 4 hours (80% volume)
12. Talk time: about 4 o'clock (80% volume)
13. Charging time: about 1.5 hours

Features:
1. Audio and video synchronization, wireless freedom, dual-channel connection
2. Semi-in-ear design, light and portable, comfortable to wear
3. Binaural HD call, ANC active noise reduction, intelligent noise filtering
4. Built-in capacitive sensing element, sensitive to light touch
5. With a large-capacity charging compartment, it can continuously charge the headset
6. LED digital power display, magnetic charging in the charging compartment, automatic power off when full

Note:
1. The product should be in a dry and ventilated room, avoid contact with corrosive substances, and keep away from fire and heat sources
2. The product is charged once every 3 months during storage