Parameters : 1) Three-speed design, including LED indicator (normal/soft/pulse) 2) Pulse frequency :1500/ min 3) 2 minute sensible timing 4) Waterproof ranking :IPX7 5) Tank skill :175ml 6) Built-in lithium battery :1400mAh 7) Charging mode :Type-C charging 8) Pressure :30~110 PSI 9) Operation time :>30 days 10) Charging time :<4h