Item Type: Audio Decoder Material: Aluminum Alloy Product Model: YQ-31 Bluetooth Version: 5.0 Bluetooth Protocol: A2DP, AVRCP, PBAP U Disk Input: FAT32 Up to 32G Music Format: MP3, WAV, WMA, APE, FLAC, SBC Signal to Noise Ratio: 90dB DAC SNR: 96dB Frequency Response: 20Hz-20kHz Sound Effect Mode: Rock, Jazz, Classical, Country Button Battery for Remote Control: One CR2025 (Included) Battery Capacity: 100mAh Package List 1 x Audio Decoder 1 x Bluetooth Antenna 1 x Charging Cable 1 x Optical Audio Cable 1 x Instruction Book 1 x Remote Control Made of aluminum alloy, corrosion resistant, high strength, sturdy and durable. Powerful, stable and reliable, high chip integration, supports MP3, WAV, WMA, APE and other audio formats. Supports Bluetooth, USB, digital to analog conversion and transmission to ordinary speakers for playback, upgrading the use of ordinary speakers. Remote control allows play, pause, and track switching (previous and next). Suitable for home theater, USB drive music playback, home karaoke, mobile phone audio and other applications.