"I see. that should be very fun." He paused. "Its a braclet with a built in radar and vibraton unit. you put it on and it'll buzz whenever anything under waist hight is within half a meter, the three buttons ajust the range, one dot decreases, two dots increases. three dots, when pressed once stops the buzzing, for when your sitting, pressed again, starts it. when held for five seconds, resets range, the power source should last a good 50 years." He said humming as he walked past. "Till next lesson Lady Winter." He said and headed out on to the feilds.