Technical specifications, , Speaker system type active , Sound scheme 1.1, mono , Number of bands 2 , Wideband speaker 6.5 " , HF tweeter 1.5 " , HF tweeter 1.5 " , Speaker driver impedance 4 Ohm , HF tweeter impedance 8 Ohm , Type of earcups bass reflex type , Bass reflex port place back , Total output power (RMS) 50 W , Signal to noise ratio 75 dB , Frequency range 90--20000 Hz , DSP processor yes , Equalizer Classical, Country, Jazz, Normal, Pop, Rock , Wireless connection Bluetooth 5.0 , Operation range 10 m , Automatic power off time after disconnecting Bluetooth 10 min , True Wireless Stereo (TWS) yes , Display LED , Remote control unit no , Interface AUX audio-in , Compatibility: Windows XP / 7 / 8 / 10, Android, Apple yes , Backlight LED , Lighting effects yes , Number of backlight modes 4 , Backlight off function yes , Power supply via USB, 5V, Li-Ion battery , Battery voltage 7.4 V , Battery capacity 3600 mA·h , Battery type form factor 18650, 3.7V, 1800mAh - 4 pcs (series-parallel , connection) , Battery life at 50% / 75% of maximum volume 5 / 4 hrs , Battery charging time 5 hrs , Built-in FM-tuner yes , Tuner frequency range 87.5--108 MHz , Aerial the connected AUX cable is used as an additional antenna , MicroSD card support yes , USB flash drive support yes , Maximum supported capacity of memory card / USB flash drives 128 GB , Audio file formats MP3 , Microphone jack 6.3 mm jack , Microphone in ports 1 , Connectors 6.3 mm jack, AUX audio-in, Micro-SD, Type-C, USB , Control panel on the case yes , Housing material plastic + metal , Color black