Plastic welder for car bumper with 400 hot staples 1、Built-in 4.1V 5000mAh battery, 4 hours full charging time which can be used for applying about 400-600pcs plastic staples.DC power supply with extremely fast heating speed,3 to 5 seconds up to 600℃(1112℉) heats up the staples and melts plastic rapidly. 2、Cordless Design for User-friendly:Work freely anytime, anywhere, without being limited by wires or worrying about power supply issues, allowing you to unleash your creativity without constraints. 3、200W FAST HEATING:Rapid heating in 1-3 seconds, with a heating speed three times faster than 50 watts and twice as fast as 70 watts. It heats directly without any waiting time, saving a significant amount of time and enabling quick completion of repair projects. 4、Short circuit conservation function: When the welding machineis accidentally short circuited, the welding machine indicatorlight will flash and automatically disconnect all workingcircuits to protect the welding machine. 5、Usage efficiency:One charge can be used for 2-3 hours, with a soldering quantity of 400-600PCS.