21940 - Flip 24 (black)
21941 - Flip 24 (blue)
21942 - Flip 24 (green)
6,700mAh designed to give up to two full phone charges.
2.1A USB output is higher than standard USB chargers, giving a recharge in just 4 hours. Charge in and out simultaneously with pass through power.
Compatible with Goal Zero's line of portable solar panels.