I like the idea of the model that locks around your balls but what I’d want is the ability for the Domme to use it from anywhere. It would be a real head game to live not knowing when the shocks would be coming. Or how intense the shocks would be. The Domme could hit you with regular low level shocks just to remind you she is there but then buckle you with an occasional high powered one to remind you of your place and keep you from getting complacent.