Communication: XH2.54-4P, TTL 3.3V output, 5V power output, providing a most current of 500mA Power input wire: 10mm² clear flexible copper wire, with tinned copper terminals at both ends Soldering pen wire: 10mm² clear flexible copper wire, copper pen body, quick-changes pen tip, compatible for 3mm diameter soldering pins, and most supported length is 100mm Foot switching interfaces: standard DC5.5-21mm socket, compatible for foot switches and integrated handheld spots welding pens Note:Do not use switching power supplies, transform, chargers, supply power to the spots welding machine, as it may damage the control circuit of the spots welding machine. Do not supply voltages exceeding 15V, Manufacturer: REITINGE