PetSafe UL275BM Wireless Fence Receiver Collar No Batteries.

The item will come as pictured.  the button cover is missing.

If you have any questions please ask before buying.

Will work with the following Petsafe & Sportdog underground Fence Systems, PIG00-10777, PIG00-13661, PIG00-10778, PIG00-11007, PRF00-3004W, PRF-304W, MIG00-10939, MIG00-11013, and the Sportdog SD-100A HOWEVER WILL NOT WORK WITH the PIG00-13619 or IUC-4100, UltraSmart system or YardMax PIG00-11115