I have had this for several years sitting in my falconry box. It is set up for a tail mount, but, it also comes with a cap that can be used for a leg mount if the spring is taken off. Freq is 216.064 and uses 2 of the 392 batteries. Checked it out this morning and it is working perfectly. Figure this has to be worth about $70 plus shipping. If you have something of equal value, lets talk.