88-115MHz FM Wireless Microphone Transmitter

Wide 88MHz - 115MHz Transmission Spectrum: Transmits high-clarity FM audio signals across standard FM broadcast frequencies, tunable using standard FM radio receivers.

High-Sensitivity Electret Condenser Capsule: Onboard sensitive microphone picks up clear ambient voice and acoustic sounds up to several meters away.

Onboard Frequency Tuning Inductor/Trimmer: Features a adjustable coil trimmer to fine-tune the center transmission frequency and prevent channel overlap.

Ultra-Compact Battery-Powered Form Factor: Lightweight, low-power circuit footprint operates efficiently on small DC power supplies (2V - 9V), ideal for portable surveillance or audio bugs.

Long Transmission Range: Provides line-of-sight wireless audio transmission up to 100 meters when connected to an external wire antenna.

Housing & Board Material: High-grade FR-4 glass-epoxy PCB with surface-mounted LC oscillator components, electret microphone, and tinned header terminals.

Technical Specifications:

Operating Voltage: 2.0 V - 9.0V DC (3V-6V recommended).

Operating Current: 9mA - 15mA.

Transmission Range: 20m - 100m (environment dependent).

Frequency Range: 88 MHz - 115 MHz FM.

Color: Green/Black PCB with Silver Microphone Capsule and Copper Tuning Coil.

Usage Advice: Connect 3V-6V DC to VCC and GND; solder a 30cm - 70cm flexible wire to the ANT pad to serve as an antenna, and tune a nearby FM radio until clear audio is captured.

Maintenance: Avoid physical bending of the tuning coil once calibrated; keep circuit surfaces free from dust and moisture.

Essential DIY Wireless Audio Node: Position as a compact, entry-level FM transmitter for DIY wireless microphones, room monitoring, baby monitors, and radio broad-casting projects.

Highlight Easy FM Tuning & Long Range: Emphasize how easy it is to tune using any standard smartphone FM radio or commercial FM receiver without needing specialized wireless receiver hardware.

Recommended Cross-Sell Add-ons: Pair with Microphone Sound Sensor Module, 65dB Microphone Module, XD-21 LM358 Amplifier Module 100x Gain Operational Amplifier, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Sound Sensor Modules collection page as your standard FM wireless microphone transmitter module.