INSTRUCTIONS FOR USE:
Power on: Press and hold the "Or/Off" button for 2 seconds to power on, at this time the red and blue indicators flash alternately.
Shutdown: Press and hold the "On/Of" button for 5 seconds to shut down, at this time the blue indicator light of the work indicator is off.
Mode switching: When the device has a TF card with MP3 audio files inserted, the music of the TF card will be played by default after booting; when there is no TF card inserted, the Bluetooth function will be defaulted after booting; press the
"mode switch" button to switch the playback mode.
Color light conversion: Press and hold the "mode switch" button for 2 seconds in the boot mode, "tum on/off the color lights and switch the color light mode.
Bluetooth connection: Tum on the Bluetooth function of the mobile phone, search for the Bluetooth name xYD-88x to connect, when the connection is successful, t he blue indicator light is always on, the phone is playing music, and the blue indicator light flashes slowly at this time. Play Pause: When the music is playing. press the "On/Of' button to pause the music, and then press the "On/OfF button to resume playback.
Switch songs: In the music playing state, press the xx button to switch to the previous song, and press the xx" button to swilch to the next song.
Volume addition and subtraction: long press the x button to decrease the volume, long press the xx" button to increase the volume, and release the button when the volume is adjusted to a suitable volume.
Answer/hang up the call: When the incoming call is in status, press the "On/Of button to answer the cal, and then press the "OnvOlt button to hang up the call.
Reject incoming calls: When the incarning call is in status, long press the "On/OfF button for 2 seconds to reject the incoring call.
Last number redial: Press the xOn/Oir button twice continuously to automatically dial the last call.
Automatic station search: In radio mode, press the xOr/Ol" button to start automatic station search, start searching from low frequency band to high frequency band, and aufomaticaly save the station after searching for the strongest signal of the station, unti the frequency band is searched, twil automaticaly start istaning. During the search process, press the "ONOFFx bution to exit the automatic search station, when you need to enhance the radio signal, insert the charging cable into the charging port to use as an ederal anterna.
Radio station switching: in radio mode, press the "" key io swich to the previous radio station, and press the x key to switch to the next rado station
Low battery reminder: When the battery is low, the voice prompt "how battery
Bluetooth disconnection: The phone actively disconnects or exceeds the usage distance, and the voice prompts "disconnection"
Automatic shutdown: When the device is just tumed on, it will automatically shut down after 10 minutes of no connection in Bluetooth mode, and automatically shut down after 10 minutes of disconnection.
Charging: When the charging cable is connected to charge, the red indicator light is always on, and the red indicalor light is off when fully charged

FEATURES:
1. Support Bluetooth music playback, Bluetooth calling, TF card playback, FM radio, colorful lights, AUX audio input
2. Full-band speaker + diaphragm, clear sound and deep bass
3. Built-in high-capacity polymer lithium battery
4. Low voltage intelligent detection and reminder to charge
5. Energy saving and environmental protection function (automatic shutdown after 10 minutes without connection)
TECHNICAL PARAMETER:
Speaker specifications: 52mm/42/5W
Bluetooth name: YD-66
Bluetooth version: 5.0
Transmission distance: 210 meters
Input voltage: DC5.0V/A
Output power. 5W
Frequency Response: 20Hz-20KHz
FM frequency band: 78.5-108.0MHz
TF card capacity: 532GB
Signal-to-noise ratio: 275dB
Product size: 8.0x8.0x11.5CM