Sigtronics BT-888Pro Operating Instructions

Basic operation and attention of wireless microphone

● Open the battery compartment correctly and install the battery. Attention shall be paid to the cathode and anode of the
battery.
● Turn the power switch on microphone to "ON". If the power indicator lamp does not flash or always lights, inspect
whether the battery voltage is insufficient or the polarity of battery is installed oppositely.
● Adjust the microphone volume knob on the audio amplifier and its position according to the sound volume when singing
to reach the ideal effect.
● If you use wireless microphone temporarily during the singing process, you can put the microphone switch in mute
status; once using is stopped, you can turn the microphone switch in off status. The microphone will pick up sound to
amplify it and input to the horn of the audio amplifier no matter it is in mute or off status.
● The effective using distance of wireless microphone is within 30m, please do not use it beyond the effective range in
order to avoid inferior effect; when the electricity quantity of battery is reduced or the wireless interference signal of the
using environment is too strong, the using distance shall be shortened accordingly.
● To reach the best singing effect, the distance between mouth and microphone shall be 5-15CM and the best angle is
45degrees.
● After the microphone is used for a very long time and lacks of electricity, the indicator lamp for electricity insufficiency
will light. Please timely change the battery in order not to affect the singing effect.
● Please do not use the two microphones of the same frequency point for singing within short distance since it may cause
silence or interference noise.
● If you have purchased more than two sets of active audio amplifiers matched with wireless microphone from the
company and intend to use them together, please select the varieties in different standard frequencies. If the frequency is
identical, two sets machines can not be used until they are separated from each other for 100m to avoid mutual
interference and other unnecessary troubles! Never get the machine to VCD/CD/DVD and other equipments with strong
interference frequency when they are used to avoid mutual interference between the same frequencies, which will affect
the wireless signal receiving of the microphone.

Common simple faults and guidance for operation and repair

Fault description Possible causes
The power switch is turned on
Speaker not power on The speaker is out of battery
Audio input is not correctly selected.
The audio cable is not connected properly
to the line input.
Main volume is switched to minimum.
No sound
No sound when playing U-disk.
No sound when playing by line input
Poor contact or damage of external audio
cable
External microphone is not fully inserted
External in the jack
The external microphone switch is not
microphone has
turned on
no sound
The volume knob of microphone is off
The switch of wireless microphone is not
turned on
Problems with
The wireless microphone is not Installed
wireless
with batteries
microphone
The sound of wireless microphone is in
distortion
If the above solution did not solve the issue, please contact the nearest local maintenance department. The
product technology of our company is upgraded continuously, the product descriptions in this manual are
subject to change without notice.
Troubleshooting
Turn on the power switch
Use power adaptor to charge the battery
Change the audio input by pressing the
mode button.
Reconnect the audio cable.
Properly adjust the volume knob.
Check the U-disk or the mode switch button.
Change the audio source of line input.
Readjust or change audio cable.
Totally insert the microphone to the jack
Turn on the switch of wireless microphone
Properly adjust the volume knob of
microphone
Turn on the switch of wireless microphone
Install the batteries in the wireless
microphone
Change the battery of wireless microphone
Professional Mobile Karaoke Speaker
Operating Instructions
Please carefully read the operating instruction before using our product