note:This soldering iron has no battery and needs to be connected to a power bank or a USB port of a mobile phone charger.Access method: USB; Rated voltage: 5VNominal current: 2 A; Power range: 8-10WTemperature range: 250 -420 (482-788 F)Warm-up time: 8-12s; Soldering iron tip resistance: 2.1-2.3 ; Idle time: 10 minInstructions for use:1.Since the soldering iron has no battery, a 5v2A power supply needs to be connected to start the soldering iron as a power supply(1). Connect the USB power cable, unscrew the protective cover, press the button, the green light is on, the green light is the first level, the temperature is about 230-280 degrees.(2) .The second time the button is pressed, the blue light is on and the temperature is about 300-350 degrees.(3). Press the button for the third time, the red light is on, and the temperature is about 380-420 degrees.(4). Press the button a fourth time to turn it off.2. Notice:(1). Please adjust the power button according to personal usage habits.(2). Make sure the current you connect is 5V / 2a.(3). Current less than 2A will cause improper welding temperature or failure to start.Characteristics:1. It will stop heating and switch to idle mode, then restart renewal after 10 minutes of use.2. As long as the input voltage is 5V / 2A, it can be used as the power supply of the welder, which is portable and very suitable for outdoor operation.Type:Horseshoe head Set-CMaterial:Metalcolour:SilverPackage Contents:1 x USB Soldering iron kitOnly 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.