S- Kit is a small and exquisite shortwave radio station, working mode is CW. Transmitting local oscillator frequency: 7023KHz; receiving local oscillator frequency: about 7023-7026KHz. Radio Station Power Supply Voltage is 9-13.8V (Battery or Linear Regulated Power Supply is Recommended), and the positive and Negative Poles are Not distinguished. Antenna: 50 ohm, 7MHz, standing wave ratio 2.0. Radio station receiving static current: 20mA, transmitting current: 120mA, Transmitting power: 1.2W, does not support automatic transmission, key: manual key powering on the radio station, connect a dummy load to prevent accidental emission from burning. "" is a small volume of simple 40 meter band -power amplitude telegraph transceiver, Despite it's small size and DC receiver limitations, it is capable of working several hundred miles when connected to a good 40 meter antenna. "S-", Designed by "LXQQFY.",. Improvements are as follows: The vertical resistance is changed to horizontal resistance, Solves the problem of resistance to short circuit. We do not distinguish between positive and negative electrodes of power supply. Power input range increased to 13.8V. Add the buzzer sounds for send (use jumper ), Add led signal for send. Power supply: 9~13.8V Volts DC, 500mA (Recommend the use of batteries) Antenna: 50ohm,7MHz,SWRLess than 2.0 Receive: static current 20mA Transmission power: 1.2W Frequency: launch the vibration frequency,7023 KHZ Receives the local oscillator frequency: about 7023-7023 KHZ Work mode: CW Material:Acrylic colour:green Package Contents: 1 * portable shortwave radio Only the above package content, other products are not included. Note: Light 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.