Feature: 1. 1 to 6 correspond to 6 frequency bands: 3.8, 7, 9, 14, 18 or 21, 27 or 29. 2. ISB, USB, CW are the three mode choices. 3. DT is a signal from main board. Specification: Item Type: Signal Generator Display: 1602 LCD Input Voltage: DC 8V-9V Input Current: 200mA Frequency Range: 0-55MHz 6 Bands: 3.8, 7, 9, 14, 18 Or 21, 27 Or 29 Product Size: Approx. 80 x 45 x 30mm / 3.15 x 1.77 x 1.2in Keys and Connection Interfaces: ENC: Encoder switch MEM: Switch for memory mode VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A. SSB: Working mode change: circulate from USB, LSB, AM, CW, then keep looping... RIT: Fine tuning to receiving frequency CAL: Set functions KB-1 and KB-2 have common shared pin, but is not GND Package List: 1 x Signal Generator Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.