Item Type: Decoder Board_x000D_Material: PCB_x000D_Purpose: Car audio modification, home audio modification, DIY Bluetooth audio, electronic project production_x000D_USB Power Supply: Universal Micro USB 5V power supply_x000D_Power Supply: 3.7-5V_x000D_Signal to Voice Ratio: 90db_x000D_THD+N: -70db_x000D_Crosstalk: -86db_x000D_DNR: 91db_x000D_Support Configuration: A2DP/AVCTP/AVDTP/HFP_x000D_Communication Distance: Approx. over 5m / 16.4ft (different due to environmental obstacles)_x000D_Support Mobile Phone System: For Android / iOS system_x000D_Channel: Dual-Channel_x000D_Audio Quality: MP3 lossless decoding_x000D_Built-in Power Amplifier: None_x000D_External Power Amplifier: Does not limit the small external power amplifier_x000D_Needle Spacing: Approx. 2.54mm / 0.1in 1With Bluetooth connection password, it can prevent others from mistakenly connecting and operating. 2Ultra-small size, easy to be embedded in modified products, and does not take up space. 3High?fidelity output circuit, resistance?capacitance isolation and no noise, with good sound quality. 4You can insert U disk, memory card or key operation, only use mobile phone to connect and play MP3. 5Dual?channel stereo output, compatible with most power amplifiers, home theaters, car audio and other equipment in the market.1 x Decoder Board