Specification:

• Bluetooth specification:Bluetooth 5.1 
• Operating distance: 10meters 
• Working time: 15 hours
• Charging time: about 3-4 hours 
• Standby time: 200 hours
• Battery: polymer lithium -ion battery 3.7 V, 400mA/h Charge input voltage: DC 5V
• Speaker:φ40mm
• Sensitivity: 110dB +/-3dB
• Frequency range:20Hz - 20,000Hz
• Impedance: 32 ohms
• Charging port: Type-C
• Accessories: Charging cable, AUX cable, manual 
• ***with TF card