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Feature: Module Properties: non-isolated step-down module (BUCK) Input Voltage: DC 7-40V Output voltage: DC 1.25-36V continuously adjustable Output current range: 0.05-8A (the default output current is 1A) Turn light current: constant current value * (0.1), such as the constant current value is 3A, Turn light current is set to constant current of 0.1 times (0.1 * 3A = 0.3A), when adjusted constant current value to 2A, then Turn light current is constant current of 0.1 times (0.1 * 2A = 0.2A). this version is 0.1 times fixed Operating temperature: -40℃ to +85℃ Operating Frequency: 180KHz Conversion efficiency: Up to 95% (efficiency depnd on the input and output voltage, current, pressure) Short circuit protection: Yes (Limit the current to the set current value) Over-temperature protection: Yes (over-temperature shutdown output automatically) Input reverse polarity protection: Yes (please do not reverse connection for long time) Output protection against anti-irrigation: none Charging (turn lights) indication: Yes (charging red, full charger blue, constant current green) Wiring: IN+ IN- as the input positive and negative, OUT+ OUT- as the positive and negative output Aluminum Case Size: 70MM x 39MM x 31MM Battery Charging method: 1.Make sure the recharge battery float voltage and charge current, input voltage of the module. 2.adjust constant voltage regulator, the output voltage about 5V. 3.With a multimeter ( to 20A) Measuring output Short-circuit current, Also adjust the constant regulator allows Output current reaches a predetermined charge current value; 4.Adjust Constant regulator allows Output voltage reaches the float voltage; 5.connected to the battery, try charging. (1,2,3,4 step input connect power, output do not connect battery.) LED constant current driver Usage: 1.Make sure LED current and the maximum operating voltage; 2.adjust constant voltage regulator, the output voltage about 3V. 3.With a multimeter ( to 20A) Measuring output Short-circuit current, Also adjust the constant regulator allows Output current reaches a predetermined LED working current value; 4.Adjust Constant regulator allows Output voltage Reach LED maximum working voltage; 5.Connected to the LED, test. (1,2,3,4 take steps input connect power, output do not connected LED.) Package Include: 1x DC Converter Items will be shipped within 1-2 business days after Paypal confirmed the payment. Pls be noted that import duties, taxes and/or other customs related charges are not included in the item price nor shipping charges, these charges are the buyer's responsibility. ship way and Delivery Time: United States : 12-20 days arrived (ePacket shipping outside USA). Russian Federation : 12-20 days arrived (ePacket shipping outside RUSSIA). other countries:One is ordinary Air Mail without tracking number (Economy Int'l Shipping), And the other is Registered Air Mail with tracking number (Standard Int'l Shipping). PayPal payment only . Please be sure your shipping address is correct. We will only follow your address listed at the PayPal payment for the shipment. We are not allowed the address change through email, please add a payment note if you want change ship address. Payment must be received 12 days after auction ended. Please do not bid if you are not intending to buy. Unpaid dispute & negative feedback will be filed to eBay for non- payable bidders. if you do not have PayPal account, please register free in http://www.PayPal.com Defective Items: If the item is defect, you can report it to us within 5days after delivery date and send it to us within 7days for a exchange or refund. If you decide to return the item to us, please make sure that you have contacted with our customer service and already report all details form that issue and have send us pictures. If a return was not refers to item quality, buyer should respond to the ship fee. After we got that returned item, we will send you a replacement or refund you, that depends on our available stock. If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back. Please contact me before you return it. Your Satisfaction is our main goal and your feedback is very important to us. We want our customers to be 100% satisfied with their order. When you receive your order, please take a moment to leave us positive feedback. A 5 star rating on eBay to us is appreciated, vital and very valuable to the continued success of our business. If you are not satisfied, please contact with us via eBay message before leaving feedback. 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