Specifications:Welding nozzle and grounding voltage: 2.7-4.2VPower supply mode: USBBattery capacity: 650mAhNote: Soldering iron head needs to be purchased separately by customersJoint set: pointed end, heads, horseshoe, wire burning head (four types of joints)Efficient Precision: With a weight of only 33 grams, easy-to-handle home projects or professional repair work can be accomplished with this pen-shaped design and portable soldering iron kit, providing ideal flexibility.Efficient Heating Design: With the 2.7V, 3.7V, and 4.2V settings and 650 mAh battery, our Soldering Iron Kit quickly reaches desired temperatures for fast heating. Adjust the temperature to fit your needs with the three-speed adjustable voltage function for efficient performance.Real-time Display: Features an intelligent temperature control system, LED display, safe usage, and real-time status updates, ensuring optimal performance.Multifunctional Use: With our Soldering Iron Kit, you can achieve precise soldering results. Its compatibility with various 510 threaded accessories makes it perfect for electronic component welding or handicraft production.Power Boost: Keep your soldering iron powered up with our kit's USB charging capability. Enjoy the convenience of recharging it anytime, anywhere, using the USB-C port. Say goodbye to interruptions in your work and hello to a smoother experience.This Soldering Iron is perfect for easy-to-handle home projects or professional repairs. Its efficient heating system and intelligent temperature control system allow precise soldering.