Xxjj Cordless Air Duster For Computer Keyboard Cleaner, Powerful 60W 40000Rpm With 6000Mah Battery, Usb-C Fast Charger,BlueFaster and More Efficient Air Duster with a speed of 40,000 rpmcharging time: 1.5 2HBattery working time: 30 minMotor speed: 40000 rpmOUTLET AIR FLOW: 6KPA (MAX)Air flow without load: 190 220 lminMaximum power: 60WBattery cap..