Sure-Fi Pinger Sure-Fi Pinger is a device to test wireless field transmission. You do not need to wire, drill or ditch. With Sure-Fi it allows you to wirelessly connect up to 1 mile across any construction, material or wall and +50 miles with a line of sight. All this with AES128 encryption. With Sure-Fi connect sensors, buttons, access (any device with relay, dry/wet contact, Wiegand or HVAC systems). Features: Indicators of signal strength, transmission, and reception Test button for the easy range test Technology Reach up to 1 Mille through obstructions and over more than 50 Miles with a line of sight. Patented obstacle removal technology, using 900 MHz. Works within metal structures. Patented PBC antenna design FCC (USA) and IC (Canada) certification Specifications : Frequency band: 902 - 928Mhz Channels: 72 (frequency hopping) Receiver sensitivity: -133Dbm Link budget: 163dB Range: Up to 1 Mile through obstructions. More than 50 Miles with a line of sight Security encryption: AES128 Key Features Penetrates Through Walls and Metal Structures With Ease No Wiring, Drilling or Trenching Required for Installation Advanced 900 MHz Technology Eliminates Obstacle Interference Secure AES128 Encryption for Complete Data Protection 72 Automatic Frequency Hopping Channels for Reliability FCC and IC Certified for Legal US and Canada Operation