The V02H4 is a compact OBD2 Bluetooth scan tool designed to help you monitor your vehicle's health directly from your smartphone or computer. Built around the ELM327 chipset, this device connects via Bluetooth 4.0 and is compatible with Android, iOS, and Windows operating systems, allowing you to read and clear diagnostic trouble codes to understand why a warning light has appeared on your dashboard. Beyond simple error clearing, it provides real-time parameter monitoring and engine performance visualization, turning complex data into something you can actually use to track how your car is running. The device is housed in a durable black ABS plastic casing and plugs directly into the OBD-II port, operating within a voltage range of 9V to 16V. To keep you informed of its status, it features dedicated LEDs for power, PC connection, and OBD link. Because it supports nine different OBD2 protocols and uses a plug-and-play setup, it is a practical choice for car owners who want a quick way to diagnose issues without professional equipment. Its wide operating temperature range from -40°C to +85°C ensures it remains functional in both freezing winters and intense summer heat, while the low standby current consumption of 25 mA prevents unnecessary drain on your battery.