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For Use With Home Passive Speakers, The Diitao 100W X 2 5.0 Stereo Audio, Black. Product Details ZK-1002L Bluetooth 5.0 Mini Power Amplifier Board Parameter: Input Mode: Bluetooth Work Voltage: DC 5V-24V (Above 2A) Channel: 2 CH Stereo Output Bluetooth Version: Bluetooth 5.0 Bluetooth Transmission Distance: 50 Ft MAX Power Output: 100W x 2 Terminating Impedance: 4 - 8 Ohm Match Speaker: 50 - 300Watt Work Humidity: 0% 95%RH DC Socket: 5.5*2.1mm Package Includes: 1PCS X ZK-1002L Stereo Bluetooth Power Amplifier Module 2PCS X Acrylic shell 4PCS X 16mm Copper column 8PCS X 9mm Screw 1PCS X 20cm power cable 1PCS X Screwdriver 1PCS X knob ?ZK-1002L Amplifier Board? 2 CH 5.0 stereo output power 100W * 2,working voltage range 12-24V/5A, for 4-8?, 50W-300W passive speakers.2.1 channel stereo output,Comes with a large-volume black gold heat sink to ensure efficient heat dissipation, and long-term output will not overheat and stop. ?High Power High Sound Quality?It is recommended to use a DC15-24V power adapter with a current above 2A. Please use a power adapter with sufficient power to connect the amplifier board. Otherwise, the sound will be distorted. ?Bluetooth and AUX Function?Bluetooth 5.0 version, Transmission Distance Is Farther. The Transmission Distance Can Reach 49 Feet In An Open Environment. If your Play Device Does Not Have Bluetooth, You Can Also Input Audio Signals Through The 3.5MM Headphone Plug. ?Protection Mechanism?The ZK-1002L devices feature short-circuit and thermal protection as well as overvoltage, undervoltage, and DC protection to prevent total failure. In the event of an overload, the device reports the fault condition to the processor to protect itself from damage. ?4*470uF green gold capacitors?To ensure the power storage capacity, the DC head with cable is provided, which can be compatible with the input power interface of this product, even if you do not have a DC head adapter or battery, you can also wire it. The power amplifier module does not contain a power supply, and an external power supply is required. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.