2.4GHz Wireless Lapel Microphone System with 100-Metre Range and OLED Display

This 2.4GHz wireless lapel microphone system provides professional-grade audio capture for diverse speaking and recording applications, from classroom lectures and business presentations to video production and live streaming. Operating on the 2.4GHz digital frequency band with GFSK modulation, it maintains a reliable connection across distances up to 100 metres in clear line-of-sight conditions, making it suitable for larger venues and mobile recording scenarios. The system combines technical specifications tailored for clear voice reproduction with practical features like an 8-hour battery life and intuitive controls, packaged in a compact 32g unit that can be discreetly clipped to clothing or placed in a pocket.

Technical Specifications and Audio Performance

The microphone system delivers audio quality suited to speech and vocal applications, with specifications engineered to minimise interference and maintain signal integrity across its operating range. With an RF output power of 10mW and a PIFA antenna design, it balances transmission distance with compliance to wireless regulations in many regions.

Frequency Response and Sensitivity

The system offers a frequency response range from 50Hz to 18KHz, capturing the fundamental frequencies of human speech while filtering out extreme lows and highs that typically represent environmental noise. Both the built-in microphone and external lavalier input share a sensitivity rating of -39dB, providing consistent gain structure whether using the integrated pickup or an external clip microphone. The signal-to-noise ratio exceeds 78dB, ensuring that captured audio remains clear with minimal background hiss or electrical interference.

Maximum Sound Pressure and Input Levels

For handling louder speaking volumes and closer microphone placement, the built-in microphone can accommodate sound pressure levels up to 120dB SPL, while the lavalier microphone input supports up to 110dB SPL. The reference audio input level for the microphone input ranges from -30 to -42dBv with no attenuation applied, providing flexibility for different voice volumes and microphone types. This specification helps prevent distortion when speakers raise their voices or move closer to the microphone during dynamic presentations.

Operating Range and Wireless Specifications

The 2.4GHz digital wireless transmission provides a practical operating distance of up to 100 metres (approximately 328 feet) in optimal conditions with minimal obstructions. This range accommodates most presentation venues, lecture halls, and recording environments while maintaining audio integrity through GFSK modulation, which helps reduce interference from other wireless devices in the same frequency band. The omnidirectional polar pattern of the microphone ensures consistent pickup regardless of the speaker's head position relative to the microphone element.

Features and Practical Operation

Beyond its core audio specifications, the system includes several features designed to enhance usability in real-world scenarios, from visual feedback mechanisms to power management options. The combination of these elements creates a user experience focused on reliability and straightforward operation rather than complex technical adjustments.

Display and Monitoring Capabilities

A high-contrast OLED display provides real-time feedback on essential parameters including audio input levels, battery status, and current settings. This visual monitoring allows users to confirm proper operation before and during use, reducing the likelihood of technical issues during important recordings or presentations. The display's clarity in various lighting conditions supports quick checks without interrupting the user's focus on their content delivery.

Power System and Battery Life

The built-in lithium-ion battery provides approximately 8 hours of continuous operation on a full charge, sufficient for a full day of presentations, lectures, or event coverage. Charging can be accomplished through either a standard Micro USB DC 5V connection or through direct charging contacts, offering flexibility depending on available charging equipment. This power system eliminates the need for disposable batteries while providing the capacity needed for extended recording sessions.

Input Options and Mute Function

The system offers two primary audio input methods: a built-in omnidirectional microphone integrated into the main unit and a 3.5mm TRS input for connecting external lavalier microphones. This dual-input approach provides flexibility for different recording scenarios, whether preferring the convenience of the integrated microphone or the discreet placement of a clip-on lavalier. An integrated mute function allows temporary audio cutoff when needed, useful for private conversations during breaks or when handling unexpected interruptions.

Physical Design and Usage Considerations

The physical characteristics of the microphone system influence its practical application across different environments and user scenarios, from its compact dimensions to its operating temperature specifications. These design elements ensure the product functions reliably while remaining unobtrusive during use.

Dimensions and Weight

With dimensions of 56.5mm in length, 38mm in width, and 26.1mm in thickness, the main unit presents a compact form factor that can be easily clipped to belts, pockets, or clothing without creating noticeable bulk. At approximately 32g (1.13oz), the lightweight design minimises strain on clothing and reduces user awareness of the device during extended wear. These physical characteristics support discreet use in video recording scenarios where equipment visibility should be minimised.

Temperature Specifications

The system operates within a temperature range of 0℃ to 50℃, accommodating typical indoor environments and many outdoor conditions in temperate climates. For storage, it can withstand temperatures from -20℃ to +55℃, providing reasonable tolerance for transportation and non-operating conditions. These specifications indicate the product is suited for standard presentation and recording environments rather than extreme temperature applications.

Connection and Placement

The 3.5mm TRS lavalier microphone input accommodates standard clip-on microphones with compatible connectors, while the line-in input option provides additional flexibility for different audio sources. The omnidirectional pickup pattern of both microphone options reduces the need for precise microphone placement, though positioning within 30cm of the speaker's mouth typically yields optimal results. The wireless transmission operates most reliably when the antenna area remains unobstructed and when used within the specified distance parameters.