ST-05C 0.2W Bluetooth USB TF Card Microphone Multifunctional Stereo FM Transmitter Audio Solution

Working Voltage: DC 12V

Working Current: Approx. 300mA

Frequency Range: 77.0 - 108.0 MHz (adjustable, step 0.1 MHz)

Output Power: 20mW / 200mW (adjustable)

Modulation Mode: FM stereophonic (Stereo FM)

Deviation: ±75 KHz

Signal-to-Noise Ratio (S/N): >40dB

Frequency Response: 40Hz - 15KHz (±0.2dB)

Stereo Separation: ≥45dB (5KHz-15KHz)

Total Harmonic Distortion (THD): <0.3%

Input Interfaces:

3.5mm AUX audio port

RCA audio input

3.5mm condenser microphone input

USB port (supports USB flash drives)

TF card slot (supports Micro SD cards)

Bluetooth 5.0 (Display name: HW-BT)

Output Interface: BNC antenna port (Impedance 50Ω)

Broadcast Distance: Approx. 50 - 600 meters in open environments (depends on power settings and surroundings)

Product Dimensions: Approx. 105mm x 120mm x 45mm (excluding protruding parts)

Net Weight: Approx. 0.42kg

The ST-05C is a high-performance, multi-functional portable stereo FM radio transmitter. It integrates Bluetooth, USB, TF card playback, AUX audio input, and microphone functionality. Utilizing PLL phase-locked loop (PLL) frequency stabilization technology, it ensures stable frequency and clear broadcast quality. The device offers two adjustable transmit power levels: 20mW and 200mW, suitable for wireless audio transmission needs in various scenarios such as square dancing, drive-in theaters, home theaters, simultaneous interpretation, and small stages. Its compact design, low power consumption, and stable performance make it an ideal choice for high-quality audio broadcasting in small areas.

1.Multi-functional Audio Source Input: Supports Bluetooth 5.0 wireless connection, USB/TF card local playback, a 3.5mm AUX interface, RCA wired input, and condenser microphone input, meeting various audio source needs.

2.Dual Power Options: The 20mW (short-range stable) and 200mW (long-range coverage) power levels can be set via internal jumpers or switches (actual product may vary) to adapt to different broadcast ranges. High-fidelity stereo transmission: Utilizes FM stereo modulation, with stereo separation ≥45dB and distortion <0.3%, ensuring high-quality broadcasting.

3.Stable and precise frequency: PLL phase-locked loop frequency synthesis technology, frequency range 77-108MHz (covering global FM bands), 100kHz step accuracy, and no frequency drift.

4.Plug and play, easy to operate: Simply connect the antenna and power supply to work; supports simultaneous playback of two audio sources (e.g., AUX + Bluetooth).

5.Wide applicability: Suitable for square dancing instruction, shop background music, community broadcasting, car theaters, conference room simultaneous interpretation, home wireless audio expansion, etc.