The WM40U wireless microphone operates in the UHF frequency range and has a wireless transmission distance of up to 40 meters. It is designed for a variety of applications. The included signal receiver features a universal 6.3 mm jack, allowing it to connect with various portable speakers that have a microphone input or with devices that have a short, wired microphone. If the external audio device has a 3.5 mm microphone input, the included adapter can be used. Once the signal receiver is connected to the speaker and the microphone is turned on, the devices pair automatically and are ready for use.

The microphone offers a wide frequency range of 65 Hz to 18 kHz and delivers very good, detailed sound. Key specifications include:

• Distance between microphone and receiver: greater than 10 m
• Frequency band type: UHF
• Frequency response: 65 Hz to 18 kHz
• Signal-to-noise ratio (S/N): greater than 85 dBA
• UHF frequency range: 640 MHz to 647.5 MHz
• Total harmonic distortion (THD): less than 0.3%
• Transmitter power: less than 10 mW
• Receiver plug: 1/4" (6.3 mm) unbalanced
• Maximum output power of the receiver: 120 dBV
• Receiver battery: Lithium-ion 3.7 V, 1200 mAh
• Charging time of the receiver battery: 2-3 hours at 5 V/1A
• Operating time of the receiver battery: up to 7 hours
• Microphone batteries: 2 x Alkaline AA (included)
• Operating time of the microphone battery: up to 3 hours
• Power source of the receiver: DC 5V/1A
• Dimensions:
• Microphone: 230 x 49 x 49 mm
• Receiver: 25 x 56 x 120 mm.