Comtek ALS-216 Personal Trainer Communication SystemThe COMTEK ALS 216 Assistive Listening System is a one way communication system offering perfect speech clarity over long distances. The speaker wears a personal M 216 transmitter and lapel microphone. The listener wears a PR 216 personal receiver and earphone. The listener can be as far away as 300 ft from the speaker and still hear every word with total clarity. This system functions as a remote microphone for the listener overcoming difficult