MARTINROLAND U-3300BT Owner’s Manual


  •  To be sure you take maximum advantage of the features, read this manual carefully before use.
  • For purposes of improvement, specifications and design are subject to change without notice.
  • This manual has been checked carefully, if any mistakes because of printing or other reason make your puzzle, please call the dealer.


Front Panel

  1. Music Volume Adjustment
  2. Mic Reverb Adjustment
  3. Mic Bass Adjustment
  4. LCD Display information
  5. Mic Treble Adjustment
  6. Mic Volume Adjustment
  7. Mired Mic. Input 1
  8. Mired Mic. Input 2

Rear Panel

  1. Antenna A
  2.  Video-Input
  3. Left Audio Input(L)
  4. Right Audio Input(R)
  5. 3.5mm Headphone Output
  6. Microphone Output
  7. 12VDC Power Input
  8. Video Output
  9. Le Audio Output(L)
  10. Re Audio Output(R)
  11. Antenna B
  12. Power Switch

How To Connect the Bluetooth



Overall characteristic

  • Frequency Range: UHF900MHz~930MHz
  • Frequency Stability: ≤ ± 20ppm
  • Dynamic Range: ≥ 80dB
  • Harmonic Distortion : ≤ 0.5%
  • Frequency Response : 40Hz-15KHz (+3dB)
  • Operation Temperature: 10 ℃~+50℃
  • Effective Field : UHF(80ft), Bluetooth(20ft)


  • Power: AC110~240V
  • Consumed Power: 4W
  • Signal To Noise Ratio: >80dB
  • Pseudo Drying Ratio: >80dB
  • Channel Interference Ratio: >80dB
  • Audio Output : 0~400mV
  • Sensitivity: < 5dBu

Handheld Microphone

  • Output Power: 30mW
  • Modulate mode: FM
  • Modulate Degree: > 25KHz
  • Harmonic Suppression: < 40dB
  • Battery: 2 x 1.5V AA battery
  • Working Hours: 12hrs

Trouble Shooting:

Problem Solution
The LCD of the receiver does not light up when you turn ON the receiver power? Check the operation power is correct or not and plug it securely
The LCD does not light up when you turn ON the mic power Make sure the battery is inserted correctly or if it is the low battery life
Noise and distorted sound
  • Shorten the operation distance of the transmitter and the receiver
  • Move the receiver far away interference.
  • Replace the batteries.
  • The same operation frequency of two transmitters should be avoid


  • Please don’t let any objects (dust, raindrop, grit) fall into the machine to cause any damage to it.
  • Please avoid the machine falling onto the ground. Keep it away from serious strike or shake.
  • The machine is not waterproof. Please avoid any liquid splattering onto the machine
  • When the screen shows a low battery, please change the battery on time.
  • Please don’t use your hand to cover the mic head when you are singing, it is easy to cause howling.
  • Please make sure to cut off the power before repairing or cleaning this machine.
  • The machine can be cleaned with a soft cloth. To clean off stiff dirt, please use dry cloth dipping with neutral wash; clean the machine with a dry cloth then.
  • Please don’t use volatile gasoline, diluents, or other chemicals for the machine body, or the surface will be corrupted.

Martin Roland International Corp.365 N. Berry StreetBrea,

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