Supports Android and Apple systems. Control playback, volume, sound effects, track navigation, play/pause, and playback modes via the companion app. AUX audio input delivers pure Hi-Fi sound quality—clear treble, balanced mids, and powerful, dynamic bass. 2.1-channel Bluetooth digital power amplifier board with independent left/right channel and subwoofer level adjustment; 360-degree continuous tuning. Bluetooth 5.0 for improved connection stability, extended range, and high-fidelity audio transmission. Built with high-quality materials for durability and long service life. Product Name: 2.1-Channel Bluetooth Audio Power Amplifier Module Model: YS-S100L Bluetooth Version: 5.0 Channels: 2.1 Input Options: Bluetooth, AUX, USB flash drive, USB sound card Power Supply: DC 5–26 V / 10 A Audio Outputs: Left/Right channels + Subwoofer + 3.5 mm stereo output Volume Control: Premium encoder knob with smooth operation Frequency Response: 20 Hz – 30 kHz Signal-to-Noise Ratio: 92 dB Output Power: 50 W × 2 (left/right) + 100 W (subwoofer) Satellite Speaker Compatibility: 10–100 W, 4–8 Ω Subwoofer Compatibility: 20–200 W, 4–8 Ω Protection Features: Electrostatic, overcurrent, short-circuit, and thermal protection Special Feature: Compatible with YS Audio app for remote control Color: Black Material: PCB Dimensions: 95 × 88 × 25 mm Package Includes: 1 × Top Cover 1 × Bottom Cover 1 × PCB Board 1 × Screwdriver 4 × M2×5 + 4 mm Copper Standoffs 4 × M2×18 mm Copper Pillars 5 × Button Caps 8 × M2×4 mm Screws Note: Color may vary slightly due to lighting and screen settings. Dimensions are subject to a tolerance of ±1–3 cm.