Specification
1. Frequency Range: 2401 – 2483 MHz
-
This lies in the 2.4 GHz ISM band
-
Same band used by:
-
Wi-Fi
-
Bluetooth
-
Wireless microphones
-
-
License-free in most countries
-
Suitable for short-range wireless audio transmission
2. Frequency Stability: ±10 PPM
-
PPM = parts per million
-
Indicates how stable the signal frequency is
-
±10 PPM means:
-
Good frequency accuracy
-
Less drift due to temperature or battery changes
-
-
Important for clear audio and reliable connection
3. RF Power: 25 mW
-
Output transmission power
-
Considered low-power, safe, and legal for consumer devices
-
Typical working range:
-
10–30 meters indoors
-
30–50 meters line-of-sight
-
-
Designed to avoid interference with other devices
4. Harmonic Suppression: >65 dB
-
Measures how well unwanted frequencies are reduced
-
Higher is better
-
65 dB means:
-
Clean signal
-
Minimal interference
-
Better compliance with RF standards
-
-
Important in crowded wireless environments
5. Modulation Method: FM (Frequency Modulation)
-
Audio is sent by varying frequency
-
Advantages:
-
Good noise resistance
-
Clear voice transmission
-
-
Common in:
-
Wireless microphones
-
Audio transmitters
-
Intercom systems
-
6. Maximum Modulation: ±10 PPM
-
Indicates how much the signal frequency deviates during transmission
-
Affects:
-
Audio loudness
-
Clarity
-
-
±10 PPM suggests controlled, distortion-free audio
7. Operating Voltage: 1.5V (AA)
-
Runs on one AA battery
-
Very common and convenient
-
Suggests the device is:
-
Portable
-
Battery-powered
-
Low energy consumption
-
8. Working Current: 100 mA
-
Amount of current drawn during operation
-
With a typical AA battery:
-
Battery life ≈ 15–25 hours (depends on battery type)
-
-
Reasonable for continuous wireless use