The Watchman W450 model is the first cellular-based advanced telephone entry and access control system that also has live streaming video of visitors at the gate, directly to your smart phone. It is an ideal solution for single family residences and businesses everywhere.  Available on AT&T or Verizon LTE networks. Watchman W450 works on a cellular LTE network, thus telephone lines or internet access is not needed; this means it can be installed virtually anywhere there is a gate.