Features:

• Model: OWS902
• Bluetooth Version: V5.3
• Speaker Size: Φ8mm
• Earbuds battery: 40mah, Charging Case: 300mah
• Speaker Frequency: 20Hz?20KHz, Sensitivity: 102±3dB 1kHz

Specifications:

• Model: OWS902
• Frequency :20Hz_20Khz
• Impedance :7Ω ?±15? at 1000Hz
• Sound level/Sensitivity :Input Power 50mW Sine Wave Input 4.2V? Must Be Normal
• Connection Type :Bluetooth
• Microphone :Yes
• Battery :Charging Case Battery: 3.7V/400mAh
• Earbuds Battery: 3.7V/50mAh
• Duration :Rated output power: Rated Power Input 50mW
  Music Playtime: 6H?60% Vol?
• Call time: 4H Standby time: 200H
• Charge time: 2H