From the manufacturer MI-X 450 Pro Enigma Sound First — Design Philosophy The MI-X Series is built with good audio components with meticulous in-house audio testing to deliver a truly stunning audio performance with a twist of retro styling. AUDIO RELATED AUDIO RELATED Decoding: MP3, FLAC, WAC, APE, WMA Frequency Response: 50Hz — 15KHz Signal to Noise Ratio: > 70 dB Playback Mode: BT, AUX-IN, USB, Instrument Input Mics: Two Mics included POWER & BATTERY Power Output: 120W Playback Time: 3-8 Hours (Depending on Volume) Charging Time: 7 Hours Charging Current: DC SV / 2A (Type C) Battery: Built-in Lithium-Ion 22500mAh TRANSMISSION STANDARDS & PHYSICAL DIMENSIONS