Bluetooth version 5.0 for seamless connectivity and improved audio quality. Compact aluminum design in blue, ensuring durability and a modern aesthetic. Supports multiple input modes including Bluetooth, AUX, U disk, and USB sound card for versatile usage. Equipped with a cool function that allows control via the Sinilink-APP for added convenience. Protection mechanisms including power reverse connection protection, short circuit protection, and self-recovery overheating protection for safe operation. Item Type: Bluetooth Power Amplifier Material: Aluminum Color: Blue Model: XY-KA15H Supply Voltage: DC8-24V (the higher the voltage, the greater the output power) Output Power: 20W Channel: 2 channels Input Mode: Bluetooth + AUX + U disk + USB sound card Volume Adjustment: Encoder volume adjustment, smoothly feel, one-key switch Transmission Distance: Approx. 15meter / 49.2ft (unobstructed) Number of Channels: Left and right dual channels (stereo) Adapted Speakers: 10W-200W 4Ω 8Ω 16Ω Package Contents: 1 x Bluetooth Power Amplifier