Features: 1. With a digital automatic gain control (AGC) circuit, the received signal is more stable. 2. Low power consumption, when powered by two AA batteries, the total current is about 19mA. 3. Support global frequency band 76-108Mhz. 4. Supports the radio station memory function, time the machine is turned on, it will automatically return to the station and volume of the last time it was turned off. 5. The circuit is simple, the production is easy, and it can work normally without debugging. The FM radio circuit is very simple, the total number of components does not exceed 19, although the number of components is small, it includes two types of components: patch and plug-in, which is very suitable for novices and small partners who want to practice patch component welding. Specification: Kit Name: FM Radio Working voltage: 2.7--3.3V Working current: 19mA Radio frequency: 76--108MHz Headphone Impedance: 32 Kit Weight:13g PCB size: 56.2x30mm Color: as shown Material: plastic Package Contents: 1Set * DIY kit 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.