Compatible Models: Please Note Astro 3E will not charge devices with input currents lower than 80mAh, including iPod Nano and some Bluetooth and GPS devices Apple: iPhone 5 4s 4 3g / iPad 4 (Retina display) 3 2 1 / iPad Mini (Use with your original Apple Lightning to USB cable) Samsung: Samsung Galaxy S4 S3 S2 / Galaxy Note 2 / Galaxy Nexus / Ace / Focus Google: Nexus 7 / Nexus 10 HTC: One X, S, V / Sensation / Inspire / Droid / ThunderBolt / EVO / Radar Amazon: Kindle / Kindle Fire Motorola: Droid Razr Maxx Bionic / Triumph Sony:Sony Xperia Z J P Blackberry:Blackberry Z10 / Curve LG: Nexus 4 / Optimus / Touch Others: PS Vita / MP3 MP4/ GoPro About how to use it Press button once the LED light Up,press the button for a while,the LED Put Out; Press the button two times quickly,the flashlight will trun on/off. Charging this power bank trough micro USB input interface,plug in Micro-USB adapter ,the other wide end connected to computer. Please note item is not compatible with Asus Tablets and Samsung Tablets Description: -- Performance for iPhones: 400%-500% battery life -- Input charging time: 8-10h via 5V / 1A Oupput standard USB or AC adapter (not included) -- Input: 5V / 1.5A (max) -- Output: 1x USB 5V / 1A ;1x USB 5V / 2.1A; Minimum required current: 20mAh -- Size: 2.8 x 4.2 x 0.8 inch; Weight: 8.6 ounce -- 18 months warranty Please Note: --We strongly recommend using an adapter with output current 1A or over to charge the item. Otherwise, charge time will be significantly prolonged.