A Bluetooth earpiece is a small earphone that you attach to one ear to allow you to hear and speak via your phone when your phone is located elsewhere. Bluetooth long range earpieces can be purchased easily and cheaply through companies such as Amazon. Please note when purchasing your earpiece that it needs to cover the range over which you will be riding during your lesson. For example, if you are having a dressage lesson in a 20x60m arena with your phone located at C, your earpiece needs to cover at least the range of 60 metres from where your phone is located to the other end of the arena you will be riding in. Please do contact us if you need help with this.