It is a kind of quality audio amplifier module, which adopts quality electronic component, with process accuracy, which ensures excellent durability and long working time. AUX + BT audio input, subwoofer + left and right channel output. Multiple protections, reverse polarity, over temperature, over current and short circuit are protected. You can give it a try. Features: It adopts high-quality electronic component, with process accuracy, which ensures excellent durability and long working time. Good performance which ensures stable operation. AUX + BT audio input, subwoofer + left and right channel output. It adopts quality chip, unfiltered output, with standard sound quality. Built-in 36*25*10mm cooling element, with delicate heat dissipation effect. Multiple protections, reverse polarity, over temperature, over current and short circuit are protected. Specifications:Name: Power Amplifier ModuleMaterial: Printed Circuit Board Model: ZX-MT21Audio Input: AUX+BTvoltage: DC12-24VContard: 2.1(50W+50W+100W)Current: gt; 9AGr&L Ratio: 4-8 Omega;; 15-100WBT: 5.0Subwoofer: 4-8Omega; 15-100W Subwoofer Frequency: 20-200HzProduct Size: 93*90*22mm / 3.66*3.54*0, 87inProduct Weight: 130g / 4.59ouncePackage Size: 100*100*30mm / 3.94*3.94*1, 18inPackage Weight: 185g / 6.53ouncePacking List:1 * Power Amplifier ModuleMany questions about Dropshipping services are following:1. How many orders can you handle per day? We are a large company in Shenzhen, China, with a large warehouse that can handle large orders every day. We ship countless packages every day. We can guarantee the order you request.2. How fast can you process orders? We will arrange the shipment as soon as possible after you pay for your order. Priority delivery for dropshipping order3. Can you ship an order without any receipts, invoices and promotional offer inside the package? Absolutely! No invoices, receipts, promotional offer if you leave notes on the order (if you want, we can deliver.)4. If you need other products? We can supply most of the products you need as much as possible1If you have any other questions, please feel free to . We are very grateful for your cooperation with you.5. We can support Dropshipping of CSV/Excel files.6. There is no limited inventory to fulfill orders on a daily basis