Safety and Health: Rechargeable electric water pump is made of high quality, durable materials and does not contain BPA. Food class silicone hose, 304 stainless steel, high -density plastic ABS plastic, non -toxic and unpleasant, child -friendly. High compatibility: Compatible with all 2,3,4.5 galloped bottle cover diameter between 55-60 mm. No installation, no change, no drilling, no need to stand upright. No need to open the cover. Very simple. (Note: Place the water fuse to the water bottle to ensure that the water flows from bottom to top while pumping) Easy to use: just fix the hose and tap, place it in the bottled water and squeeze, then press to start distributing. There are 2 available keys: 1- For easy manual use, just press the red button; 2- The weight of the cup will activate the white switch at the base, remove the distributor to stop the automatically distribute water-The duplex has excellent performance: the built-in MSDS certified 1500mAh lithium ion battery and the USB charging cable (not included in the charging head), after about 20 days, it can be used quickly after 20 days. You don't need to charge every day. Avoid excessive charging and discharge, shortening battery life. Failure wireless design: Drinking water pump is easy to install and use, offices, outdoor, public places, hotels, hotels, picnics or camp activities and ideal for any place. If you use electric water distributor, both inside and outside will always be fresh water at hand