Material: mainly made of plastic, durable. The copper welding pen comes with 10AWG silicone wire and protective cover for safe use. Battery: Equipped with rechargeable battery and charging indicator, when fully charged, you can weld thousands of points on a 0,1-0,15mm nickel sheet with low power consumption. Function: Self-detection, the welding pen is automatically started when you touch the nickel sheet, and the response time is 0,8s. Good build quality, stable performance and long service life. Adjustable 6 levels: The output power can be adjusted at 6 levels, in cycles 1-6-1, and welding is more accurate. Dimensions (L. x W x H ): 5,51 x 3,15 x 1,57 inches; Package includes: 1 piece spot welding machine with 2 welding pins; 2 pieces x welding pin sleeve; 1 piece x nickel sheet; 1 piece x USB do charging cable. Specifications: Product Type: Spot Welding Machine Material: plastic, circuit board, copper Color: Black Size (L. x W x H ): approximately 140 x 80 x 40 mm / 5,51 x 3,15 x 1,57 inches Power supply: 3,7 V, 5000 mAh battery (built-in) Transmission: 1-6 gears Welding thickness: 0,1-0,15 mm Charging Input Connector: Micro USB Charging time: ok. 4 hours 1 sztuka x spot welding machine with 2 welding pins 2 x Welding Pin Sleeves 1 x Nickel foil 1 x USB do charging cable Description of the test step First press and hold the power button for 3 seconds, then turn on the device after hearing the buzzer, there are 6 gears in total. After turning on the device, press the button briefly, and when the buzzer sound sounds, change the gear to a higher one. The indicator light flashes, indicating the level of gear, and the number of flashes indicates the level of gear. For accurate counting, wait for the next flash break when you press the button to start counting. If the above tests were successful, press the soldering iron do of the object that ma to be soldered and you will hear a beep - the soldering iron has come into contact with the object and wait about 1 second for soldering; if the beep does not sound, press the soldering iron again It is recommended to line the working table with stainless steel/iron objects during the test so that spot welds can be made. Comments 1, User's product after receipt, usually the battery is not fully charged, it must first be charged before use for best results. The recommended first charge time is more than 12 hours. 2. This machine can weld 0,1-0,15mm nickel steel components, 0,1 pure nickel components. It cannot weld pure copper and other materials with good electrical conductivity. 3, Do not use for a long time, the battery level should not be too low or too high. 4, If the power is too low, it will cause the microcontroller to not work, which will cause the machine to not be able to be turned on, the charging light will not light up, in which case it should be charged, charging for a few minutes will be restored. 5. It is recommended to lay out the working table with stainless steel/iron objects during the test so that spot welding can be performed. Suggestions for maintenance 1. The battery must be fully charged before first use 2. If the battery level is low, the operation of the device may be disrupted. 3. If you don’t use your device for a long time, charge it at least once a month to extend battery life.