Lectrosonics WM - Manual User Manual | Page 2 / 24 | Also for: WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 470), WM Watertight Belt-Pack Transmitter with Lavalier Mic (Block 22: 563.200 - 588.700 MHz), WM Watertight Wireless Microphone Transmitter with M152/WP Lavalier Mic (Freq Block 22)