Self contained monitor for use in a small area such as metal shop scale.630 cubic inch plastic scintillatorsensitivity: 30KCPM/Micro R/HRvisual and audible alarm 24" x 36" x 12", data output: 9 pin connector providing 5 decade logarithmic outputRS-232 output signal ground connection power required: 95 -135 VAC, built in 6 volt sealed lead-acid rechargeable battery, battery is continuously trickle-charged weight 125 lbs. Unit is not intended for outdoor installation. Operational temperature range is 5F to 122F, expanded range available at an additional cost.