qrt 10m for sale comes with 5 collars with 4 have a tree switch on them also 4 have replaceable batterys track 219.frq both units work fine one has the yagi anntena but alose has a long anntena also 500 firm any question feel free to comment or send a message located in kentwood la or livingston la call or text 985-981-5656 225-571-4675