The boards are soldered and tested  - you need to connect up the battery leads and secure to holder with rubber band provided. 

requires 4 x AAA batteries ( not included).

This is a circuit board module, ideal for fitting in your own box. Adult supervision required when using with young children. 

Kit includes , tested board, lead and battery box and Key. We have not used button cells like a lot of our Chinese suppliers due to safety issues. 

The board is  attached to the batter box with a rubber band. The sound can be switched off and just use light, useful in a classroom situation. Listed also with a key in my other listings. 

 Suitable for straight key only . For Ham radio use the key has jack output and two wire terminal block output and is suitable for use with all low voltage DC (13V) transceivers. 

This can be supplied in quantity discounts to Scouts  and Ham Radio Clubs