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Samson Airline 77 AH7 Fitness Headset (K1 band: 489.050 MHz) Wireless headset microphone transmitter designed for trainers and fitness instructors at Crutchfield
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Samson SW7A7SQE-K3 AirLine 77 Wireless System Fitness Headset (AH7-Qe/CR77) - Frequency K3 - 492.425 MHz
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