1、Made of aluminum alloy, corrosion resistance, high strength, sturdy and durable. 2、Powerful, stable and reliable, high chip integration, support MP3, WAV, WMA, APE and other audio formats. 3、Bluetooth, USB, digital to analog conversion and transmission to ordinary speakers for playback, upgraded use of ordinary speakers. 4、You can use the remote control to play or pause, switch the previous song and the next song. 5、Suitable for home theater, U disk music, home K song, mobile phone music and other scenes. 1 x Audio Decoder1 x Bluetooth Antenna1 x Charging Cable1 x Optical Audio Cable1 x Instruction Book1 x Remote Control Item Type: Audio DecoderMaterial: Aluminum AlloyProduct Model: YQ-31Bluetooth Version: 5.0Bluetooth Protocol: A2DP, AVRCP, PBAPU Disk Input: FAT32 Up to 32GMusic Format: MP3, WAV, WMA, APE, FLAC, SBCSignal to Noise Ratio: ≥90dBDAC SNR: 96dBFrequency Response: 20Hz-20kHzSound Effect Mode: Rock, Jazz, Classical, CountryButton Battery for Remote Control: One CR2025 (Included)Battery Capacity: 100mAh