With a PTT send button and a waterproof connector for connecting to a radio (2.5/3.5 mm dual plug Albrecht/Midland standard). Base set with dual plug for connecting COHS motorcycle headsets with universal wiring to PMR radios with dual sockets, such as the Midland G7Pro. The PTT send button features a 4-pin mini-DIN connector.

The connection cable sets are designed to establish a link between a PMR radio or a navigation device and the helmet sets of the Albrecht COHS series. The connection cable set consists of a waterproof connector to the helmet set, a waterproof push-to-talk button that can be mounted within reach, for example, on the handlebars or on a glove, and the connection cable to the radio, navigation device, or intercom system.

For smaller radios (like Midland 777 and Tectalk Smart), a common 2.5 mm stereo plug is usually used. The BHS 301 N was developed for this type of connection.