Micro-processor Controlled. It provides a quick reading to determine if a vehicle battery needs a jump or replacing. Reverse-hookup and over-voltage protection, making it safe and simple to use With a four-character lighted digital display, this battery voltage tester is easy to read with accuracy. Colored LEDs indicate battery or alternator status Rubber Paint body with 30Amp Alligator Clamps The MP0514A 12V Digital Battery Tester Voltmeter and Charging System Analyzer with LCD Display and LED Indication provides a quick reading to determine if a vehicle battery needs a jump or replacing. Test Range - 4-20V DC testing range for all types of 12Volt batteries. LED Indication - Colored LEDs indicate different status of battery or alternator. Safety Protection - Reverse Polarity, Short Circuit and Overload protections. Best Quality - Black Rubber Paint Housing with 30Amp Alligator Clamps. colour: black Material: ABS size: 7x12x2 cm Package Contents: 3 x Battery Tester Digital & Analisador de de Carregamento NOTE: If voltage is under 4Volt, the LCD reading is "LO"; If voltage is above 20Volt, the LCD reading is "HI". 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.