Bluetooth Standard: Bluetooth v5.3

Battery Indicator: LED

Chipset: Blurtrum

Material: ABS+PC

Waterproof Standard: IPX-4

Wireless delay time: 51-60 ms

Model Number: YH21

Frequency range: 20Hz~20KHz

Connection range: ≤10m

Battery Capacity: 500mAh

Playing time: 70 hours

Charging Time: About 3 hours

Calling Time: About 60 hours

Weight: About 223g

Speaker Sensitivity: 108dB±3