1. This product is a semi-finished circuit board. You need to have a certain electrical knowledge and hands-on ability. You also need to prepare some necessary such as pliers, screwdrivers, soldering irons, etc. Note: Battery Not Include2. Intelligent spot welding machine, 99-speed precise adjustment, high-speed single-chip intelligent program, real-time display of battery voltage, spot welding strength can be seen. 8 MOS tubes imported from Germany, the current can reach 1600A, the welding is more transparent, and the solder joints are more beautiful3. 3-digit LED digital display, voltage alarm, clear at a glance, both a spot welder and a voltmeter. 1600A high current load capacity, support 100-200A high current welding, and the thickness of spot welding is further improved. -in 12-bit high- , voltage measurement accuracy can reach 0.01, voltage testable range: 8-24V, automatically display voltage when connected to 4. Output negative: with black soldering pen; Digital tube (3 digits): used to display the voltage of the supply or the current , the and the voltage are displayed alternately, switching once per second; Buzzer: It will sound when spot welding, key connection, or abnormal alarm5. positive: positive input, requirements: voltage: 10-16.8V, current: 100-200A; Foot switch interface: a switch to manually control the trigger of spot welding; Output positive: with red soldering penButton 1:There are 2 functions:1. Downshift, in the main interface, short press it, one 2. Enter or exit settings: long press on the main interface to enter the settings , then long press again to exit the settingsButton 2:There are 2 functions:1. Add file: in the main interface, press briefly to add one file2. : long press to off when on, long press to on when offNegative voltage: to the negative pole of the supplyXT60 interface: aircraft battery can be used as supply, aircraft battery requirements: battery above 3S4000MAH35C, is, the discharge requirement is more than 100A, preferably 150A, but not more than 200AUsage:Welding 18650/26650/32650 and other lithium batteriesRated Capacity:12V Battery Spot Welding MachineWeight:0.19KGDimensions:8.90 x 4.90 x 1.50CMMax. Welding Thickness:High Number:DIY Portable 12V Battery Energy SpotType:Acolor:BlackMaterial:plasticPackage Contents:1 x Full-featured spot welder kitOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.