Waterproof protection and extra battery in a thin, lightweight design! At only .69" thick, the juice pack H2PRO is not only waterproof, (Level 4), it exceeds Military Standards for protection while a powerful 2,750mAh rechargeable lithium-ion polymer battery provides more than 100% extra battery when you need it most. Dual-injected rubberized exterior, water-tight ports, scratch-resistant screen protection along with MIL-STD 810G and IP-68 ratings enable this battery case to protect your phone against water, dirt, dust, children and just about anything else keeping you safe in any situation. Priority+ charge and sync enables pass-through charge & sync while connected to a computer. Your iPhone 6 recharges first, and then the juice pack case recharges itself.