The Samson AirLine 99m AH9 Headset system is a unique wireless microphone solution designed to meet the specific demands of singers, presenters, educators, interviewers and other active performers. Along with a low-profile DE10x headset microphone, this frequency-agile UHF wireless system combines the AH9 micro transmitter and AR99m micro receiver for a highly-portable, rechargeable setup that offers high-definition sound completely free of cables and beltpacks.