Specifications Vacuum-Mop Name Mi Robot Vacuum-Mop Essential MJSTG1 Model Wireless Connectivity Wi-Fi IEEE 802.11 b/g/n 2.4 GHz Operation Frequency 2412-2472 MHz Maximum Output Power ＜ 20 dBm Rated Voltage 14.4 V Approx. 90 min (Standard Mode) Batery Runtime 25 W Rated Power 2500 mAh Batery Capacity 4-5 h Charging Time Rated Input Voltage 20 V Rated Input Current 1.2 A 1,000 hours of continuous operation Service Life 19