The latest on the market for communication systems, CEECOACH from German Peiker. 

The uniqueness of CEECOACH is that it allows two-way communication, and it works over bluetooth, which makes communication directly linked and without using a network. CEECOACH is super easy to use and extremly affordable. 

We at Hogsta Ridsport has added CEECOACH to our assortment on recommendation from Louise "Lussan" Nathhorst, she found it when she was helping Swedish Dressage team member Tinne Vilhelmson Silfvén in Florida. In addition to them, many of the top riders in the world use the CEECOACH System. We have sold CEECOACH to many trainers in Sweden, who all can testify how well it works.