This is an original Casio AC adapter model AD-K65EL with a 6.0V output, suitable for powering devices. The adapter has a UK plug, a 1.85m cable length, and a 2.5 mm female connector. It is designed with a 3-Contact AC male UK connector and has an output of 750mA. The adaptor is black in colour and manufactured in the Czech Republic.
eBay