Radio diy kit FM digital radio Electronic diy soldering kit Features: Circuit board size: 7.7CMX6.1CM; for Shell size: 8.4cm*6.8CM*5.2CM (old style) 8.4cm*7.6CM*5.5CM (new style) Working voltage: for DC 5V direct current (positive and negative inside the for DC for seat, do not reverse) Frequency modulation range: 87MHZ-108MHZ; FM button: press the button once to 0.1MHZ, long press the FM button to continuously add and subtract; Specifications: Weight: new parts + speaker + screws = 115G + for shell = 185G + power supply = 265G Function: digital display frequency function, power off memory function, power saving function; Power-off memory function: After turning off the power, power on again to for play the radio station before the power-off. Power saving function: 1. After each power on or pressing the FM for key, the digital tube will display the frequency for 5 seconds, and the digital tube display will be automatically turned off after 5 seconds 2. Reasons: (1) Power saving (2) When the digital tube is displayed, it will interfere with the sound. Turn off the digital tube to reduce the interference. Package included: 1 x Radio diy kit