Zk502L Bluetooth Power Amplifier Board 5.0 Stereo Audio Receiver Dual, 24V. Specification: Item Type: Power Amplifier Board Material: PCB Purpose: Digital Power Amplifier Board Model: ZK-502L Bluetooth Version: 5.0 Input Method: Bluetooth Number Of Channels: Left and Right Dual Channels (stereo) Bluetooth Version: 5.0 (Unobstructed, Approx. 15m/49.2ft) Signal To Noise Ratio: 90 dB Adapted Power Supply Voltage: 5-24V (optional 9V/12V/15V18V/24V and Other Adapters, High Power Recommended High Voltage) Adapted Speakers: 30W-200 W, 4?-8? Power supply voltage: 12V-8 ?/12W+12W, 4 ?/20W+20W 15V-8 ?/18W+18W, 4 ?/30W+30W 19V-8 ?/32W+32W, 4 ?/45W+45W 24V-8 ?/38W+38W, 4 ?/50W+50W Protection Mechanism: Self Recovery Overheating Protection, Self Recovery Short Circuit Protection Package List: 1 x Power Amplifier Board 1 x Screwdriver 9 x Screw 4 x Brass Connecting Rod 2 x Acrylic Board 1 x Knob 1 x Cable Note: The input voltage cannot exceed 24V, otherwise the audio amplifier module will be damaged. Product Features Strong Compatibility: The amplifier module is equipped with a terminal block and a DC 2.1mm socket, which is compatible with most laptop power ports. Can directly connect to wireless Bluetooth 5.0. and compatible with a variety of speakers. Two 20W, 30W or 50W power amplifier boards are equipped with various speakers (4 to 8 ?), and support Bluetooth stereo audio input and AUX audio input. Built-in Filter Capacitor: The built in filter capacitor of this digital power amplifier module makes it available for processing sound signals. Knob potentiometer design, convenient to adjust power ON and OFF, V+ and V?. Adapted Power Supply Voltage: 5-24V (optional 9V/12V/15V18V/24V and Other Adapters, High Power Recommended High Voltage). Signal To Noise Ratio: 90 dB. Adapted Speakers: 30W-200 W, 4?-8?. Protection Mechanism: Adopt acrylic protective shell design, with reverse connection protection, overvoltage protection, undervoltage protection, over temperature protection, short circuit protection. Self recovery overheating protection. Wide Range Of Applications: This bluetooth speaker power amplifier board has no POPs sound when powering on, skipping songs and pausing. It is widely used in refitting speakers, power amplifier equipment, and car Bluetooth equipment. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!