Part number:1 Welcome to my store , Hope you have a pleasant shopping trip!Description: This model uses the car audio amplifier chip TDA7388. This chip is often used in high-end car amplifiers. It has excellent performance in sound quality and volume analysis. After all, the voltage is only 12V, built-in super-power mos tube, and mutual push work, even if the load is 2 ohm speakers. No pressure, if you configure the tone board in the front, you can configure the desired high and low bass effect.Feature: 1>.Support overvoltage protection 2>.Support overcurrent protection 3>.Support overload protection 4>.Support short circuit protection 5>.Support active natural coolingParameter: 1>.Power supply: DC12-18V DC input or terminal input 2>.Output: 50W*4 3>.Load: 2ohm-8ohm 4>.Bluetooth: Support 5.0 high definition transmission, the maximum distance is 20 meters 5>.Input: Bluetooth+AUX+USB 6>.Heat dissipation: active natural cooling 7>.Work temprature-20~85 8>.Work huimidity: 5%~99% 9>.Size: 145*90*20mmPackage List: 1 x Bluetooth+AUX+USB Digital Amplifier ModuleNotes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow 1-2cm slight dimension difference due to different manual measurement. Support Overvoltage Protection. Support Overcurrent Protection. Support Overload Protection. Support Short Circuit Protection. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. Support Overvoltage Protection. Support Overcurrent Protection. Support Overload Protection. Support Short Circuit Protection. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.