Features: Using original RM PIC12F629 microcontroller for manual/automatic key control, has functions such as automatic sending of call signs, control of sending and receiving indicator LEDs, and is very convenient and practical. When using the auto key, the microcontroller can adjust the codes speed and sidetones frequency, input call signs on its own, and support power-off saving. Using quality operational amplifiers for secondary audioed active filtering greatly improves the listen performances of Super RM with extremely low background noise and excellent amplitudes frequency characteristics. The power has been increased to 4W (D882 output), and the kit uses two American magnetic rings (FT37-43 and T37-2) each, giving the Super RM strong remote communication capabilities and greatly improving practicality! The transmission frequency is 7.023MHz, and the reception frequency is adjustable from 7.023 to 7.026MHz. A new frequency offset control circuit with 2N7000 is used to improve pat frequency sound quality and listen performances. Specifications: Material: Printed Circuit Board Size: Approx. 100x60mm/3.93x2.36inch Adjusting the issuance speed: Supported Function button: 1 Automatic call sign sending: supported Power supply: 12V Receiving statical current: 25mA@12V Transmission power: 4W@12V Frequency range: transmitting local oscillator 7.023MHz, receiving local oscillator 7.023-7.026MHz Working modes: CW Package Includes: 1x PIC Version Super RM CW Transceiver Shortwave Radio Module Board Kit note: This product is a DIY loose part, not a finished product, and users need to assemble it themselves. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.