stingray

noun2

1. •
   Any of various large, venomous rays, of the orders Rajiformes and Myliobatiformes, having a barbed, whiplike tail.
2. •
   (US) A device that simulates a cell tower, used to intercept cell phone communications.

   • The device mimics a cell phone tower and gets the phone to connect to it. […] Once a signal is found, the stingray measures its strength and can provide a general location on the map. — 2014