Topeak's mobile powerbank allows you to charge smartphones and other devices while driving. The special design allows the battery to be mounted under the stem so it is immediately available.the package also includes an adapter for GoPro action cameras. Battery: 6000 mAh Li-Ion Material: highly durable plastic Charging: USB Charging time: 8-10 hours Output: USB/ DC 5V 2A Input: USB/ DC 5V 1A (Max) Battery status indication: 4 LEDs Dimensions: 9.4 x 5 x 3 cm Weight: 160 g Art.No.: TMPP-2