Brand: Pro'sKit - Model: NT-305 - Color: Yellow + Red - Quantity: 1 - Material: ABS - LCD screen display: 0.7 inch - Powered by 2 x CR927 batteries (included) - Backlight: Blue - DC test range: DC 12 / 36 / 55 V - AC test range: AC 70~250V - Auto-detecting function for battery power examination - Pen style easily clip-on your pocket portable and convenient. - Suitable for family hydropower industries appliance industries frozen industries steam locomotive industry personal DIY etc - Display "12V" indicates voltage is between 9~12V - Display "12~36V" indicates voltage is between 12~36V - Display "36~55V" indicates voltage is between 36~55V - Display "12-36-55-110V" indicates voltage is between 55~110V - Display "220V" indicates voltage is over 220V - Press "Induction test" let the head near testing cord it's normal when the left side of LCD screen display lightning symbol; there's no power if without lightning symbol - Press "Circuit continuity test" approach the wire; It's normal when indicator on there're breakpoints if indicator not illuminate.