Akai M5-Thunder Portable Bluetooth speaker with USB, Aux-In and USB for charging – 28W

Output power 28W
Impedance 4ohms
Frequency response 65-20kHz
Sensitivity 87dB+/- 3dB
Time in use up to 12 hours
Woofer 1 x 5″
Tweeter 1 x 3/4″
Baterry Li-ion 3.7V, 8000 mA
Bluetooth version 5.0
Bth channel emision power 4dbm
USB Player format MP3, WMA, WAV, FLAC and APE
USB output charger 5V-1A
Input AUX jack 3.5