zealot ze51 Bluetooth speaker very good quality

Here are simple operating directions for the ZEALOT ZE51 Wireless Speaker shown in your image:
How to Use the ZEALOT ZE51 Speaker
Charge the speaker
Use the included USB charging cable.
Charge fully before first use. The indicator light will show the charging status.
Power On/Off
Press and hold the Power button for 2–3 seconds until you hear a startup tone.
To turn it off, press and hold the Power button again.
Connect via Bluetooth
Turn on Bluetooth on your phone or tablet.
Search for ZEALOT ZE51 and tap it to pair.
Once connected, you can play music wirelessly.
Play Music
Press the Play/Pause button to start or pause music.
Use the Next (+) and Previous (–) buttons to skip tracks.
Press and hold + or – to increase or decrease the volume.
FM Radio
Press the Mode (M) button until FM mode is selected.
Press and hold the Play button (or follow the speaker prompt) to auto-search and save radio stations.
USB Flash Drive & TF Card
Insert a USB drive or microSD (TF) card containing MP3 files.
The speaker will automatically detect and play the music.
AUX Mode
Connect a 3.5 mm AUX cable from your phone or other audio device to the speaker.
Press the Mode button if needed to switch to AUX input.
Phone Calls
When connected by Bluetooth, press the Play/Call button once to answer or end a call.
Press and hold the button to reject an incoming call.
Tips
Keep the speaker within 10 meters of your Bluetooth device for the best connection.
Recharge the battery when you hear a low-battery warning.
Avoid exposing the speaker to water or extreme heat unless your specific model is rated as water-resistant.