1. With reverse connection protection, short circuit protection, low voltage and low resistance protection. 2. Mini test box design, easy to store and carry, simple application. 3. LED display, high , can provide you with accurate resistance value. 4. With the function of burning wire, testing the resistance value of heating wire, strong anti-interference ability. 5. Can be powered by 18650 battery (not included), and Micro-USB charging interface, convenient to charge the battery. Test range: 0.01-9.99Ω Burning range: 0.1 above Standby power consumption: Less than 10μA Working power supply: 18650 battery 3.7V (delivery does not include) Function: test the resistance value of the heating wire and burning wire, with charging function, with screen display Size: 80x60x2.5mm Colour:Black Material:plastic+metal Package Contents: 1 * Resistance Tester Only the above package content, other products are not included. Note: Light reflection 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.