Yosoo HAM Radio 40M CW Shortwave Transmitter Receiver Version 4.1 7.023-7.026MHz QRP Pixie Kit DIY with Buzzer This kit is a classic low-power transceivers The reception is good, highly readable code, This is a very small volume of simple 40 meter band micro-power amplitude telegraph transceiver uses a 9V square battery. the entry of the most junior amateur radio choice Beautiful metal case not only for item considerably, and can effectively shield nearby interference. There are many optional shell, for example, metal cans, aluminum boxes, medical elongated aluminum box andso on.