Weller WSM1C 40W Compact Cordless Rechargeable Digital Soldering Station Rechargeable battery for mobile, cordless service Can solder up to 1 hour off of lithium-ion battery, and recharges in 20 minutes Special function for customized settings such as auto-off, setback timer, offset, F/C, and temperature lockout Motion sensor technology initiates power to the pencil after the setback period Integrated, ergonomically designed 40W micro-soldering pencil