Features 1、Stable Performance: Accurate and clear parameter display, low power consumption, anti vibration, anti shock. 2、High Grade Texture: The matte texture is used to better integrate with your car and show more taste. 3、Waterproof Design: Effectively prevent rainwater from entering and avoid damage to the voltmeter. 4、Simple Installation: No complicated procedures, easy installation in a few simple steps. 5、Wide Application: Having a wide charging range and can be used in all vehicles with an input voltage of 12V‑24V. Specifications: Item Type: Dual Display Temperature Voltmeter Material: ABS Colour: Black Input Voltage: 12-24V Output Voltage: 5V Output Current: 4.2A Applicable Charging Range: For All Input 12V Car Charger Hole Size: Approx. 27mm / 1.1in Package List 1 x Dual Display Temperature Voltmeter 2 x Heat Shrink Tube