Product introduction: A radio made with a ready-made FM radio module. Just solder the circuits of the power amplifier and level indicator. The power amplifier circuit is composed of device PAM8406, with a maximum output power of 3W. The 2-way level indicator is composed of KA2284. Supply voltage: 5.0V-5.5V, current 500MA-2A Power amplifier + level indicator PCB board size: 9.5CM x 2.9CM Shell size: 11.9CM x 6.6CM x 6.6CM Speaker: 4 ohms 5W Amplifier MAX power: 3W Channel: Dual channel FM receiving frequency adjustment range: 87.0MHz-108.0MHz Precautions: Do not touch the back components of the module during work to avoid affecting the normal operation of the module or causing a short circuit and burning the module. This module is a radio-sensitive device, and interference from the power supply or nearby may affect the normal operation of the module. This is a DIY kit and needs to be assembled by yourself. Different batches may have differences in electronic components, which does not affect use. Colour:Black Material:PCB+electronic components+acrylic Package Contents: 1 x DIY FM Radio Electronic Kit 1 x remote control 1 x USB to DC cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. sku:313531148258