QWNN is a portable luminaire with solar cells. It is made of canvas. The design is inspired by origami. It is flat in the folded state, easy to carry, and unfolded in the shape of a lotus. The power source is charged by a solar panel or plug, with a USB interface, which can charge mobile phones and other devices. The continuous lighting time is 48 hours, with six different brightnesses, the maximum effect is 320 lumens, which is basically equivalent to the 30-watt brightness of general incandescent light bulbs. Flow Meter,Venturi Meter,Air Flow Meter,Orifice Meter Jingsu Huaerwei Science and Technology Group Co.,Ltd , https://www.huaerweiflewmeter.com 
