User Manual

Okayo C200

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1. Interface

Transmitter (Tx)

C200 Transmitter
  1. Belt clip
  2. Slider: microphone gain (GAIN)/group channel selection (CH/G)
  3. Signal indicator
  4. + / − Button
  5. Display
  6. 3.5 mm microphone input
  7. Built-in microphone
  8. Power button / Mute

Receiver (Rx)

C200 Receiver
  1. Belt clip
  2. Channel switch
  3. Signal indicator
  4. 3.5 mm headphone jack input
  5. Device ON/OFF slider
  6. + / − Buttons

2. Display

LCD Display

⚠ Low battery level
Replace the batteries when the signal indicator lights up red and the battery icon on the screen shows only 1 bar.

Battery icon

3. Signal indicator

Status Transmitter (Tx) Receiver (Rx)
Green LED

Sufficient power
Red LED

Low power
LED blinks

Muted

Receiver out of group
LED off

Device off

4. Turning devices ON / OFF

Turning ON and OFF
  • Transmitter (Tx): Press and hold the power button to turn the device ON/OFF.
  • Receiver (Rx): Slide the switch to the ON or OFF position to turn the device ON or OFF. The receiver will automatically turn off if it does not receive a signal from the transmitter for 20 minutes. If this happens, toggle the power switch again to turn the device on.

⚠ Tip
To ensure the best sound quality, we recommend placing the rider's receiver in a visible location, e.g., on the arm or attached to a pocket with a dedicated clip. Avoid placing it under clothing or inside a pocket.

5. Adjusting microphone gain (GAIN) on the transmitter (Tx)

Microphone gain
  • Slide the slider on the transmitter down to select the GAIN function. Adjust the microphone gain using the +/− buttons (1 ~ 5, default 3), if necessary.
  • Slide the slider up to its original position (GR/CH) when you have selected the microphone gain level.

6. Group channel selection (GR/CH) on the transmitter (Tx)

Group channel selection
  • Slide the slider on the transmitter to the GR/CH function. Select the group number using the +/− buttons (available channels: 1~4).

7. Adjusting headphone volume on the receiver (Rx)

Volume adjustment
  • Press the + or − button to increase or decrease the headphone volume.

8. Selecting the same channel on the transmitter (Tx) and receiver (Rx)

Selecting the same channel
  • Open the battery cover on the receiver (Rx). Slide the switch to the selected group number.
  • Set the same group number using the slider on the side of the receiver (Rx).

9. Locking / unlocking GR/CH or GAIN functions on the transmitter (Tx)

Function lock
  • Simultaneously press and hold the + and − buttons on the transmitter to unlock the group channel selection (GR/CH) or microphone gain (GAIN) functions. Note: both functions will be unlocked simultaneously.
  • A padlock icon appears when the GR/CH and GAIN functions are locked. To unlock again, press and hold the + and − buttons simultaneously.
  • Functions will be locked or unlocked until manually changed.

10. Muting the microphone on the transmitter (Tx)

Microphone mute
  • Briefly press the power button when the transmitter is on to turn the microphone ON/OFF.
  • The signal indicator blinks when the microphone is off.

11. Technical specifications

Parameter Value
Emission modulation

4GFSK, digital
Radio frequency

500–900 MHz, depending on region
Number of channels

16
Frequency response

300–3400 Hz
Line-of-sight range 1

>120 m, depending on region
Battery life 2

Transmitter: >25 hours
Receiver: >40 hours
Battery

1× AA battery
Dimensions

61 × 70 × 20 mm, without antenna and belt clip
Weight with battery

approx. 65 g

1 Range varies depending on environment and country.
2 Battery life depends on usage.