Features: 【Highly Efficient and Cost-saving】 HCALORY 2kw / 8KW diesel heater has aluminum body upgrade in 2025, it delivers an 18% boost in heating efficiency and achieves 18% in fuel savings, delivering consistent and expansive warmth for spaces up to 269 sq.ft. It reaches 122°F (50°C) in just 3 minutes, ensuring a comfortable and cozy temperature inside your vehicle or marine cabin. 【3 Types of Control】This diesel heater 12V can provide Bluetooth remote control (30 meters), remote control and LCD panel control three different ways of use to meet your; smart APP can also provide temperature setting, multiple timing groups, gear setting, altitude mode, auto start-stop, fan mode and other functions, to provide you with continuous heating and save time. 【Altitude Mode】 Our product features a smart dual high-altitude mode (2,500m/5,000m), customizable for your off-road adventures and high-altitude journeys. The protable diesel heater requires no complicated settings. The smart system