This Certified Refurbished product is tested & certified by Etekcity to look and work like-new. The product includes all original accessories, and is backed by a 90-day warranty. Test AC/DC voltage and current,resistance,capacitance; Check frequency,frequency response,duty ratio; Test diode,triode,EF probe,continuity buzzer Featues Data Hold, Relative Measurement, Max/Min Reading function Auto-ranging scales make electronic measurements much easier and a breeze Comes with a super large Backlit LCD display which is visible in low light Automatically enters sleep mode after 15 minutes of inactivity of rotary switch and buttons for saving power;