Feature:1. The power amplifier supports U disk input, AUX input, and sound card input. 3 inputs are optional2. Mobile APP control Support for Android/IOS system, APP visual operation play mode3. Super compatibility, can be widely used in various tablet computers, TVs, smart phones, laptops with Bluetooth function, etc.4. With power reverse connection protection, short circuit protection, self-recovery overheating protection protection mechanism.5. Small size, easy to carry and store, convenient to use and with good performance.Specification:Item Type: Bluetooth Power AmplifierMaterial: AluminumColor: BlueModel: XY-KA15HSupply Voltage: DC8-24V (the higher the voltage, the greater the output power)Output Power: 20WChannel: 2 channelsBluetooth Version: 5.0Cool Function: Support Sinilink-APP controlInput Mode: Bluetooth + AUX + U disk + USB sound cardVolume Adjustment: Encoder volume adjustment, smoothly feel, one-key switchTransmission Distance: Approx. 15meter / 49.2ft (unobstructed)Number of Channels: Left and right dual channels (stereo)Adapted Speakers: 10W-200W 4Ω 8Ω 16ΩProtection Mechanism: Power reverse connection protection, short circuit protection, self-recovery overheating protectionSize: Approx. 12mm / 0.5in50mm / 2in22mm / 0.9in7mm / 0.3in77mm / 3in.Package List:1 x Bluetooth Power Amplifier