AirLine Micro ESm is a UHF wireless earset system that combines a compact AH100 transmitter with an integrated omnidirectional microphone and a tabletop AR99m receiver. It features frequency‑agile pairing, tone squelch, auto‑mute, and a one‑touch scan for selecting the clearest channel. The system delivers up to 300 ft (100 m) line‑of‑sight range and offers balanced XLR and ¼‑inch/1/8‑inch outputs for easy integration.