Zealot S55 Portable Wireless Bluetooth Speaker.

Specification:

Battery capacity: 1800mAh lithium battery

Bluetooth version: 5.0

Horn: 4  5W  2

Transmission distance: about 10m

Frequency response: 100Hz-20KHz

Signal to noise ratio:  90dB

Working voltage: 3.7V

Distortion:  1%

Charging voltage: DC 5V

Micro: USB charging port

Talk time: about 3 hours

Music Playing: about 3.5 hours

Standby time: 30 days

charging time: About 2.5h different charger specifications have different time