Features Outdoor Master Electric Pump Battery With a robust 54Wh capacity, the Outdoor Master Portable Charger ensures your devices stay energized throughout your outdoor adventures. This battery works perfectly with Shark II, Cachalot, Dolphin II other brand's electric SUP pumps. Swift Inflation & Deflation Equipped with a 12V car charger, this portable battery pack enables quick inflation and deflation of up to 3 SUP boards. Spend less time preparing and more time enjoying the water. Voltage Protection Function The maximum power output could reach 150W. When the power output over 150W, the sup pump power bank will auto stop working to protect battery life. Press the power button to restart it. On-the-Go Portability Compact, lightweight, rechargable battery outlet plug, this power bank effortlessly fits into your backpack or paddleboard bag. Wherever your outdoor passion takes you, this portable charger is ready to power up your devices.