AD-135

- SP-27
The SP-27 features a clear acoustic tube that is designed to be hidden behind the ear making it hard to see. This makes it an ideal earphone for security, hotels, restaurants, retail and airports. - SP-29
Earhook type earphone with 3.5 mm plug. For use with HM-222 or AD-135. - SP-40
Earphone with 3.5 mm plug. For use with HM-222 or AD-135.