Class D 2Point 0 Dual Channel Audio Stereo Amplifier Board For Diy Sound System, Features: Amplifier type can be connected to select functions. Type D for high power, type AB for low power, factory default is high power. External shutdown can be added, SD: the default is high power level, and at low power level, chip will shut down. MUTE: low level mute, factory default high level. Specifications: Size: 3.2 x 5.5 cm/ 1.26 x 2.17 inch Weight: 25 g Efficiency: 90% Input method: single-ended General harmonic distortion and noise: 10% Power supply voltage: direct current 5V (please don't overvoltage, overvoltage will burn the IC) Output power: 5W (2? 5V)/3W (4? 5V)/1.8W (8? 5V) Input method: single-ended (3.5 mm audio monaural input) Package includes: 2 x Audio amplifier boards Notes: Manual measurement, please allow slight errors on size. The mention of brand names and any related models above is only for purposes of demonstrating compatibility. Our brand name is Weewooday. Product Features PAM8406 amplify module: working voltage: DC 5V; Output power: 5W (2? 5V)/3W (4? 5V)/1.8W (8? 5V); Input method: audio monaural input Characteristics: audio amplifier board has an efficiency of over 90%, which will extend the battery life and can be applied to portable applications; The PAM8406 provides comprehensive protection against faults with short-circuit protection and thermal protection Reliable quality: PAM8406 amplifier module is made of noble black immersion gold circuit board, compatible with KEMET audio capacitor, filter capacitors with large capacity per channel; Pure copper and gold-plated audio input terminals are included Applications: digital power amplifier board is widely applicable to LCD TVs, Mutimedia speakers, AM/FM system and DABs Package contents: you will get 2 pieces of audio amplifier boards, sufficient quantity to meet your various demands 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!