Electronics: Njm386D, Lm386 And Salon Battery Supply Audio Mono Amplifier Module Low voltage audio power amplifier module, based on NJM386D (LM386) IC design. This item has been assembled, and electrical test passed. 105? electrolytic capacitors, metal film capacitor and polyester film capacitor. FR-4 fiber glass material PCB (Double layer). Terminal blocks, easy connection wire. Volume potentiometer with power switch. Applications: AM-FM radio amplifiers. Portable amplifiers. Battery power supply amplifiers. TV sound systems, ect. Specifications: Voltage Gain : JP1 Open 26dB, JP1 Close 46 dB. Input Resistance : 10K ohm (Volume Max.) Operating Power Supply Voltage : DC 4 - 12V. PCB Size : 50 x 32 mm (1.97 x 1.26 inch) PCB Thickness : 1.6mm (0.063 inch) Maximum Height : 24mm (0.95 inch) Other Electrical Parameters, Please Read IC datasheet. NJM386 IC Datasheet: Product Features Low voltage audio power amplifier module, based on NJM386D ( LM386 ) IC design. Voltage Gain : JP1 Open 26dB, JP1 Close 46 dB. Input Resistance : 10K ohm (Volume Max.) Operating Power Supply Voltage : DC 4 - 12V. PCB Size : 50 x 32 mm ( 1.97 x 1.26 inch ) PCB Thickness : 1.6mm ( 0.063 inch ) Maximum Height : 24mm ( 0.95 inch ) 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!