1: Tighten the tip (appropriate tightness) and press 5 times within 2 seconds. (The indicator light flashes a few times) 2: Press and hold the power button to act as a soldering iron. Release it to stop working. 3: Press and hold the power button for more than 10 seconds. The battery will activate the timeout protection feature. It is recommended to press and hold for 7-8 seconds, then press (loop this operation) 4: Display indicator according to battery level. The remaining lights indicate that the battery needs to be and the charge status indicator will flash. The four lights do not flash, indicating that they are fully . 5: Need to close and press 5 times in succession. Suitable for battery models with 510 interface, the thread diameter of 510 interface is M7x0.5mm Colour:black Material:Metal + plastic Package Contents: 1 x Soldering Iron 1 x USB cable 3 x soldering iron tip 1 x Solder wire 1 x Storage bag Only the above package content, other products are not included. Note: Light 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. Charging Soldering Iron Electric Soldering Iron Soldering Iron