Technical specifications, , Speaker system type active , Total output power (RMS) 50 W , Signal to noise ratio 85 dB , Frequency range 80--12000 Hz , Sound scheme 2.0, stereo , Number of bands 1 , None 2 ? 3.5 " , Speaker driver impedance 4 Ohm , Type of earcups with passive driver , Built-in passive driver yes , Audio-in ports AUX audio-in , Wireless connection Bluetooth 5.0 , Operation range 10 m , True Wireless Stereo (TWS) yes , Hands free function yes , Display no , Remote control unit no , Backlight LED , Number of backlight colors 1 , Lighting effects yes , Number of backlight modes 1 , Backlight off function yes , Degree of dust and moisture protection IP IPX5 , Power connector type Type-C , Power supply Li-Ion battery, via USB, 5V , Battery capacity 3600 mA·h , Battery voltage 7.4 V , Battery charging time 6 hrs , Battery life at 50% / 75% of maximum volume 5.5 / 4.5 hrs , Power indicator yes , On/off button yes , Built-in FM-tuner no , MicroSD card support yes , Maximum supported capacity of MicroSD card 32 GB , USB flash drive support no , Supported file system type of storage media FAT32 Audio file formats APE, , FLAC, MP3, WAV, WMA Equalizer Bass, Vocal , Microphone jack no , Connectors AUX audio-in, Micro-SD, Type-C, USB , Control panel on the case yes , Automatic power off time after disconnecting Bluetooth 20 min , Functions that work while the battery is charging AUX audio-in, Bluetooth, , Micro-SD , Housing material plastic + rubber + metal