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

The microphone boasts a broad frequency response ranging from 65 Hz to 18 kHz, providing very good, detailed sound. Key specifications include:

• Distance between the 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 level of receiver: 120 dBV
• Receiver battery: lithium-ion 3.7 V, 1200 mAh
• Receiver battery charging time: 2-3 hours at 5 V/1A
• Receiver battery working time: up to 7 hours
• Microphone batteries: 2 x alkaline AA (included)
• Microphone battery working time: up to 3 hours
• Power source of receiver: DC 5V/1A
• Dimensions:
• Microphone: 230 x 49 x 49 mm
• Receiver: 25 x 56 x 120 mm.