You may find some info on them by googling? Get a multimeter & measure the voltage between the centre firing pin & the slide contact along the side of the foot. Some camera bodies can only take up to 6 volts or so. Check your manual.
If you are in doubt, don't put it on your camera body.
If the voltage is above 50 odd volts, I probably wouldn't want to risk even radio triggers.
You can purchase an isolating hot-shoe arrangement that will handle these high voltages.