Bluetooth solution: JL6976D4（single mic ENC ）

Bluetooth version: V5.3

Support system: Android/Apple/PC

Earphone battery capacity: 30mAh

Charging box battery capacity: 320mAh

Impedance: 16Ω ±15%

Playing time: 4H * 4 times, total 25H (50% volume)

Speaker diameter: Φ13 mm dynamic driver

Sensitivity: 104±3dB Earphone charging time: about 1.5 H

Charging time of charging box: about 2.0 H

Waterproof grade: structural waterproof

Earphone size: 54.6*43.1*26.8mm