99 each and you can order glass break detectors for $34. 99 each, smoke detectors for $29. 99 each, and water sensors for $19. 99 each. The LifeShield Essentials system goes for $199. 99 and comes with a base station, a keypad, a keychain fob, four door/window sensors, a motion sensor, a fire safety sensor, and an Asus Memo Pad 7 tablet with LifeShield software that you can use to control everything. Additional sensor pricing is similar to what you'll pay with SimpliSafe. Professional monitoring prices also vary from company to company. Ring offers one of the better deals around: For $10 per month you get 24/7 monitoring with police and fire department dispatch, full remote use of the mobile app, and unlimited cloud storage for your Ring cameras. SimpliSafe's monitoring plan goes for $14. 99 and gives you 24/7 monitoring with emergency dispatch, but you'll pay an extra $10 per month for remote use of the mobile app and to receive email and push alerts.