Features 1. Stable Performance: Accurate and clear parameter display, low power consumption, anti-vibration, anti-shock. 2. High-Grade Texture: Matte texture design integrates well with your vehicle interior and enhances aesthetic appeal. 3. Waterproof Design: Effectively prevents rainwater ingress and protects the voltmeter from damage. 4. Simple Installation: No complicated procedures; easy setup with basic steps. 5. Wide Application: Supports a wide charging range and compatible with vehicles with input voltage of 12V24V. Specification Item Type: Dual Display Temperature Voltmeter Material: ABS Color: Black Output Current: 4.2A Applicable Charging Range: For all input 12V24V vehicle systems Hole Size: Approx. 27mm / 1.1in Package List 1 x Dual Display Temperature Voltmeter 2 x Heat Shrink Tube