Safety instructions and warnings: 1. The soldering iron uses 18650 batteries, please do not connect the positive and negative levels. Please do not use the soldering iron on a circuit.2. Do not let the machine enter or soak in water. The temperature of the soldering iron tip will become higher during use, please do not touch it with your hands.3. Because the tip of the soldering iron is very sharp, please keep the tip to prevent accidents. Please do not approach flammable materials4. To prevent malfunctions, please do not use the specified external voltage5. To prevent battery leakage or fire, please take out the battery when not in use for a long timeTroubleshooting1. Start the button for a few seconds and stop heating, The indicator light is off, please replace the battery with sufficient or charge the battery.2. When the indicator light is on, the welding head is not hot, please replace with a new welding head.3. Press the indicator light to quickly turn off, and check whether the line is short-circuited.Notice The soldering iron does not with batteries, you need to buy it yourself. Model: 18650 rechargeable battery, the capacity needs to be more than 2000 to driveDrive mode includes: supply line (sold separately)Single battery-free drive requires the supply to meet 5V2a or above to drive. The red light indicates charging. The battery is fully charged and the green light indicates the charging function. Do not use it for a long time to avoid overheatingInput voltage:3.7V-4.2V supply: 8Wtemp range:300C~450C supply: 18650Charging voltage: 5Vresistance:2.0-3.6Tin melting time:Less than 15sCooling down:Less than 30sCharging access: type-cImportant Starting current: 2Acolor:blackMaterial:ABS+MetalPackage Contents:1 x Soldering iron host1 x Spare soldering iron tip1 x Solder1 x supply line1 x Simple bracketOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.