"School", a school administered by a school department of a city or town or regional school district, a county agricultural school, a commonwealth charter school or Horace Mann charter school established pursuant to section 89 or an educational collaborative established pursuant to section 4E of chapter 40.
"Two-way communication device", a device capable of transmitting, conveying or routing real-time, 2-way voice communications through radio frequency.
Mass. Gen. Laws ch. 71, § 37R