I've got a set of Tri-tronics e collars, 1 orange, 1 green. I've had these a few years so there are some marks on the collar receivers from briars, but both work great. Each collar has it's own beeper which can be toggled on/off from the transmitter. This is the older style with the flexible antenna. Comes with case, 2 collars and beepers, 2 chargers for collars and 1 charger for transmitter. Beepers take 9 volt batteries. I paid over $700 when I bought them, price for these is $300 shipped.