This is a nes style 1 button gamepad controller for your Spectrum
Re-wired for the ZX Spectrum 16k/48k/+ 128k / 128k Grey / +2a/+2b/+3 and comes
with a generous 1.5m cable
for a limited time all issues of crash on dvd are free with this gamepad! our normal price just for crash is  £3.95!
It is wired for Sinclair Joystick Compatible Standard and plugs directly into the Grey128k /+2a/+2b/+3 with the 9-pin plug
will also work other Spectrum machines with a compatible sinclair joystick standard interface
simply run any game and choose 'sinclair joystick' 

Button B and Button A are usable as your fire button, select and start buttons are not wired
more reading:
 
Not all games work well if controls are re-defined with keys such as chuckie egg which does not support joysticks, some games may also work better with joysticks, but must games are simply better with gamepads!