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 precision, 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.