Use with Android, iPhone, iPAD/tablets,and iPOD/MP3s It runs at 1 amp for both the input and output Ready to use. Comes pre-charged at 4000 mAh. Re-charge using USB Up to 2X full charge Lightweight Limited Edition It allows for approximate usage times of: Two full charges 48 hours of talk time 30 hours of music time 20 hours of video time