Bluetooth version: V4.1

Waterproof grade: household waterproof
Bluetooth connection effective distance: about 10 meters
Input voltage: DC5V / 1A (Micro USB interface)
Battery capacity: 400mAh
Playing time: 2-3 hours (high volume).
Speaker power: 3W
Nominal impedance: 4 ohms
Sensitivity: 800mV
Bluetooth operating frequency: 2.402GHz-2.480GHz
Speaker frequency response: 100Hz-20KHz
Function: Bluetooth music player, Bluetooth connection, call function
Purpose: mobile phones, tablets, laptops and other devices with Bluetooth