RAVPower's 10050mAh Dual USB Waterproof Clip Power Bank is made for the outdoors with its waterproof, dustproof IP66 rating and shockproof design. The casing of this power bank is robust with a clip to keep it attached and with you at all times. Its iSmart charging technology detects and delivers the optimal charging current to your device with its dual USB-A ports of up to 3.4A of power.