Wireless microphone set AKG WMS40 ISM 3 UHF frequency, portable lavalier/handheld options

The AKG WMS40 ISM 3 UHF wireless microphone set is a compact solution for clear speech and small live-performance applications. Designed to operate on UHF frequencies, this portable kit includes selectable transmitter options (lavalier or handheld depending on the bundle) and a single-channel receiver that aims to reduce interference while offering reliable audio transmission. The system is suitable for presenters, teachers, small bands, and event hosts who need a straightforward, mobile setup for voice reinforcement.

Advantages

The set delivers consistent audio clarity through UHF transmission and a simple receiver interface that minimizes setup time. Its portable form factor and selectable transmitter options make it adaptable for different use scenarios, from hands-free speaking with a lavalier to dynamic handheld vocal use. Reduced interference features and focused coverage provide stable performance in compact venues and mobile applications.

Suitable for

• Presentations and corporate meetings
• Classroom teaching and lectures
• Small live performances and rehearsals
• Guided tours and public speaking
• Mobile event setups and lightweight AV rigs

Key specifications

• Operating band: UHF frequency range suitable for portable wireless audio
• System configuration: single-channel wireless receiver with compatible transmitter options (lavalier or handheld)
• Audio application: vocal and speech reinforcement with emphasis on clarity
• Connectivity: standard audio output compatible with mixers and amplifiers
• Power: battery-powered transmitters for portable use; receiver power via external adapter or mains
• Form factor: compact receiver chassis designed for tabletop or rack placement in small setups

How to use

Install the receiver in a location with clear line-of-sight to the transmitter and connect its audio output to a mixer or amplifier input using the appropriate cable. Power on the receiver and the chosen transmitter (lavalier or handheld), then set matching frequency/channel if manual selection is required. Position the lavalier microphone on the speaker’s clothing near the mouth or hold the handheld transmitter at a distance of 5–15 cm from the mouth for optimal vocal pickup. Adjust the gain on your mixer or amplifier to achieve a clean signal without clipping, and monitor with headphones if available.

Recommendations

For best performance, choose a receiver location elevated from floor level and away from large metal objects or other RF equipment. Replace transmitter batteries before extended events and perform a soundcheck in the actual venue to identify potential interference and set appropriate receiver levels.