Model Number: jdx-fans-622 Brand Name: jdx Key Specifications/Special Features: Output air volume:1-Speed 873L/min (working time about 2 hours)2-Speed 459L/min (working time about 4 hours)3-Speed 242L/min (working time about 8 hours)Output power: 4WBattery: 18650 lithium-ion batteryCharge input: 100-240V ACOutput: 5V 1A DCCharging time: about 5 hoursDimension: 140x106x42mm Model JDX-fans-95 Speed mode 3 ranges Output power 4W Working time(H) 2-4-8 Battery installation removable Charging time (H) 5 Dimension (mm) 140*106*42 N.W (g) 280 G.W (g) 325 Output: 5V 1A DC Packing size (mm) 145*125*72