This is a very small volume of simple 40 meters micro-power continuous cable transceiver, use the 9V battery or external 7~12V DC power supply.
Features: Very small volume of simple 40 meter band micro-power amplitude telegraph transceiver uses a 9V square battery. Good reception, highly readable code. One of the most primary radio enthusiasts entry choice. Upgrade version of low power transceiver. Buzzer can make a sound of beep along with the key action, adds fun for the beginner.