AirLine 99m AH9 system is a unique wireless microphone solution designed to meet the speci c demands of active performers. Available in Headset and Fitness Headset con gurations, this frequency-agile UHF wireless system combines the AH9 micro transmitter and AR99m micro receiver for a highly- portable, rechargeable setup that offers high-de nition sound completely free of cables and beltpacks. SPECIFICATIONS: Available Operating Channels ......... 100 D (542-566MHz) 300’ (100m) line-of-sight Tone Key Frequency.......................... 35kHz AR99m Wireless Micro Receiver Balanced +9dBu (XLR), unbalanced +14dBu (1/4", 1/8") Balanced 240O (XLR), unbalanced 810O (1/4", 1/8") USB Port For XPD Wireless/AH9 charging AH9 Wireless Micro Transmitter HS: DE10x miniture condenser (omni) FHS: HS: 20Hz–20kHz FHS: 50Hz–12kHz 10 mW EIRP Up to 8 hours by built-in Li-ion 4x windscreens (HS), windscreen (FHS), AC adapter 3.5” x 9.5” x 9” (90mm x 240mm x 227mm)