The WM Watertight Wireless Microphone Transmitter by Lectrosonics is designed to operate in wet or dusty environments. The WM resists damage in harsh environments, but also offers a comprehensive feature set that makes it equally at home in film, television, and on stage.

The WM's input preamp is built of very high quality, low noise components with a wide gain range. The DSP-controlled input limiter has a range of more than 30 dB and a dual-release envelope, making it transparent while maintaining low distortion. Dual-color LEDs on the control panel accurately indicate audio input level for precise gain adjustment.

Lectrosonics patented Digital Hybrid technology revolutionizes wireless microphone transmission. Digital audio signal is converted and encoded for analog transmission, then decoded and converted back to digital audio at the receiver. The result is an exceptionally low noise floor with clear audio reception retained at greater distances. To meet the demand for both extended operating range and extended battery life, the WM transmitters offer selectable output power of 50, 100 or 250 mW.

The WM transmitter is made of solid, machined aluminum housing with a corrosion-resistant finish. The moisture-sealed control panel has a backlit LCD and enlarged membrane switches. The antenna is made of an extremely durable, multistrand alloy that will withstand heavy abuse. It is mounted with a compression sealed strain relief that prevents dust and moisture from entering the housing.

Frequency Block 23    Water Resistant Seals    Digital Hybrid Wireless Technology    Variable, Selectable Power Output    256 Synthesized UHF Frequencies    Servo Bias Input with Selectable Voltage    Corrosion-Resistant Aluminum Housing    Compatibility Modes for Versatile Usage    LCD Interface with Lockout Option    Lasts Over 14hrs on Lithium AA Batteries

The WM transmitter includes an M152/WP Omnidirectional Lavalier Microphone with Watertight Connection. It features a wide frequency response that accentuates the presence and character of the human voice. The omnidirectional polar pattern provides a generous response at the direct and off-axis sections of the microphone capsule.

The WM features selectable 50, 100, 250 mW output power.

For smooth operation in wet or dusty conditions, The WM transmitter features O-ring sealed battery compartments and input jack, a compression sealed antenna port and gasket sealed control panel and back cover.

Lectrosonics incorporates digital and analog audio technology to enhance range and eliminate the noise associated with compandor circuits.

The WM transmitter is completely compatible with all current Lectrosonics Digital Hybrid receivers and older Lectrosonics analog receiver models as well.

The WM transmitter is powered by two lithium AA batteries, for up to 14.5 hours of continuous use.

Related Questions and Answers

Q: 1. HSS. ?? will this unit do ?

A: This unit can do HSS depending on the camera its used with up to 1/800th.

Q: 2. What is the difference between this unit for $75 and the "standard" unit for $100?

A: We are not aware of another Yongnuo model for $100.

Q: 3. Does the Flash Exposure Lock feature work with this on the 5D series bodies? I could not get it to work on my 5D Mk II, but it DID work on my 1Ds Mk III

A: Assuming all firmware is up to date, it should certainly work on the 5D series cameras.

Q: 4. Does the unit tilt or does it only lay flat?

A: The transmitter is in a fixed position.

Q: 5. Will this work on a Sony a7r iii?

A: While it hasn't been tested specifically with the A7R III, it should work with no issue to trigger the Impact VC-500WL monolights.

Q: 6. Would this work with a canon 430ex rtiii speedlite?

A: Yes this transmitter is compatible with the Canon 430EX III RT.

Q: 7. I'm looking to get a couple of small flashes like the Canon 270 EX II or equivalent for outdoor macro work, the flashes will be mounted on the bottom of the camera with a bracket. Will this item work for this?

A: This would not be suitable for the Canon 270 EX II. For the 270 EXII you would need a TTL cord.

Q: 8. has anyone been able to upgrade firmware for this model YN-E3-RT II Controller on a Mac?

A: At this time, firmware updates are limited to PC users only.

Q: 9. Do you know, this one probably use with speed light Canon 580 ?

A: You need to get this Set, one goes on the Camera, the other goes under your 580 flash, off camera. Yongnuo YN-622C II E-TTL Wireless Flash Transceiver for Canon (2-Pack) BH #YOYN622CII • MFR #YN-622C II

Q: 10. What is the difference between this unit and Canon’s ST-E3-Rt for $285? Is there any functionality lacking?

A: The YN-E3-RT II would have similar functions to the Canon ST-E3-RT but at a lower price point.