Top Features Upto 180minutes battery life when on the Action 2 . Built in microSD Card . Hot Swappable . External microphones can also be used when attached This module increases Action 2\'s battery life includes a built-in microSD card slot and can be used with an external microphone. With the magnetic lock this hot-swappable module can be attached to the Camera Unit allowing you to get more out of your Action 2. When connected your Action 2 can film for up to 180 minutes so you can fully enjoy recording without missing a beatWhen connected Action 2 can film for up to 180 minutes and gains a microSD card slot. It’s even hot-swappable and can be used with an external microphone. Specification Dimensions 39×41.6×21.4 mm . Weight 56.6 g . Built-In Battery . Battery Type LiPo 2S . Capacity 1300 mAh . Energy 5 Wh . Voltage 7.7 V . Charging Temperature 0° to 40° C (32° to 104° F) . Charging Temperature 5° to 60° C (41° to 140° F) . Operating Time* Camera Unit + Power Module 180 minutes . Charging Time** Camera Unit + Power Module 90 minutes . *Tested in a laboratory environment while recording 1080p/30fps (Power Reserve) video with electronic image stabilization disabled and should be used for reference only**Tested in a laboratory environment when using a 5V/2A USB adapter and should be used for reference only.