CEECOACH® PLUS is solde as single. If you want a DUO you buy two. 

NOTE! Cannot be used with previous versions of Ceecoach.

CEECOACH® PLUS has a bluetooth connection between the device itself and the headphones, although it works with standard wired headphones as well. 

CEECOACH® is a user-friendly system that allows simultaneous speech between the riding instructor and the participants. The light, weather-resistant and robust units are easy to use.
CEECOACH® communication system uses Bluetooth technology to achieve a stable and secure connection without a mobile phone network, which provides excellent voice and sound quality.

CEECOACH PLUS can be used for 16 participants, has a system that does not require WI-Fi, mobile or radio waves.

CEECOACH PLUS has a really good sound without interference.
The package includes:
1 x CEECOACH PLUS
1 x holder 1 x belt clip
1 x Velcro strap
1 x headset
1 x charging cable
1 x screwdriver
1 x Quick Start Guide CEECOACH® Plus also has a range of up to 700 meters and 18 hours of battery life, which is very impressive.

Color: Black