Check the listing for details. DC-DC 2V-5V to 5V 1200MA 1.2A Step-Up Booster USB Mobile Power Supply Module NEW. Condition: New. Listed at 0.99 USD. DC-DC 2V-5V to 5V 1200MA 1.2A Step-Up Booster USB Mobile Power Supply Module NEWProduct Image: Product Description: Features: Booster ModuleCondition: NewInpute voltage: 2.0V～5.0VNo load output voltage: 5.1V ±0.1VTransfer efficiency: 90%(max), 85%(average)If charge for iPhone 5, voltage should over 3VInput 2 v ~ 5 v dc voltage, can stable output 5v dc voltageInput with two AA batteries can output current of 1000 ma, single section lithium batteries can be output current of 1200 maChargeing for mobile phone, camera, single chip microcomputer,digital productsWith USB, wide range of uses3.7V up to 5V / 1A typical application efficiency reached 87%Ultra small sizeWith indicator light, and set aside to identify the installation position of resistanceColor is shown as pictures Package Included: 1PCS * DC-DC 2V-5V to 5V 1200MA 1.2A Step-Up Booster USB Mobile Power Supply Module FeedbackWarrantyShipmentFeedbackWe appreciate your feedback very much. As it will motivate us do better. If you have any questions with our goods or service, Please kindly contact us firstly before leaving negative feedback. Thank you in advance Warranty1. All merchandise will be carefully test before shipping. We will try our best to avoid any quality problem. 2. We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be paid by customer. 3. If you are not satisfied with the product, Please contact us. We'll provide you a satisfying solution.Shipment1.Normmly we will send the goods within 1-3 working days after your payment is verified . 2.Please check if the goods are in good condition and sign before the delivery man leaves.If you find the product is lost or damaged on the way. Please take photo and let the delivery men confirm it. Then we will help you let the shipping company compensate you.On May-23-19 at 06:09:04 PDT, seller added the following information: