Features: Reduce electromagnetic radiation effectively and protect your health with this car transmitter power reducer. Utilize advanced frequency control technology to precisely adjust your car transmitter's power output. Suitable for individuals who frequently use their phones while driving, such as business people and drivers. Perfect for various car scenarios including private vehicles, taxis, and trucks. Especially beneficial for long distance drives and fast paced journey, effectively minimizing electromagnetic radiation exposure. Experience peace of mind with multiple protective features of this car transmitter power reducer, ensuring safe and worry free usage. Specifications: Material: Metal Working Voltage: 12V Size: About. 65x20x20mm/2.56x0.79in Package Includes: 1x Car Frequency Changer Converter note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.