Remote buzzer
There is someone who wants to be in a striaghtjacket gagged and hooded at a large event space but i cant find a safety thing yhat will work when they need to safe out. Does anyone have any links for remote buzzers or something that can alert as they want to left somewhat alone under a table and it is hard to hear them without being to close and they cant be seen.
Edit: based on both responses so far i will mention we are talking a club level of sound and while i know this is risky i am trying to find a method by which something in either hand can alert me via a physical effect as i can sit under the table with them but will be less then a meter away from them.
Edit2: it is starting to look like i go option 2 which is not chaining there legs and putting tbem in a position to kick either me or a something else as a safe word.