Class D 2Point 0 Dual Channel Audio Stereo Amplifier Board For Diy Sound System, Product Details 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. 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 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.