Input: 5V/1A Output: 5V/2.1A（max） Conversion rate≈85% Product features: A. A-grade original polymer battery with 6000mah capacity, safe and stable. iPhone 4/4S/5 can be charged for about 3 times. B. The design of one line with two interfaces at both sides connects input interface and output interface and realizes charging and discharging in one line. It is convenient to carry. Besides, there is another USB interface for your own data cable to charge devices. The maximum output current is 2.1A and two mobile phones or one tablet can be charged at the same time. C. Delicate design is made for Micro and even for mobile phone with leather case can be easily plugged into the Micro charging interface of Delta. D. Simple and slim design. White, red, yellow or blue matched with black. Shaking to show it’s the remaining capacity by four blue LEDs.