Switch Between Bluetooth Pairing And Aux-In Mode By Call Button Black With Unique battery protection design get longest the lifetime M6Pro bluetooth speaker.The speaker's battery is down to 30%, and the Bluetooth speaker's volume drops to 20% to protect the battery. Charge the battery for more louder voluem.(it takes about 4 hours to fully charge the battery) Long Range Longer Playtime: Bluetooth 5.0 provides fast connection and incredible wireless Bluetooth range of up to 100 feet from your almost any bluetooth device and smart phone.LONGER BATTERY PLAYTIME UP TO 20+ HOURS at the Bluetooth speaker volume is at 50% and off the lights. How to get more Louder volume:The volume of the speaker will be reduced to 20% when the battery is left at 30%. To make the speaker more durable, charge it if you want to raise the volume. How to work with the M6pro Portable Speaker.1.Once the product is switched on, it enters wireless mode and the power Buttons button begins to flash.,M6Pro Bluetooth Portable Speaker will be ready for pairing with your phone.2.Plug the cable into the AUX audio jack and M6Pro Bluetooth Speaker automatically switch to Aux mode.3.Press the "phone" button (located next to the power button) to switch from AUX-IN mode to Bluetooth Pairing Mode when the M6Pro Bluetooth Speaker is under the Aux mode. What You Get: Comes with 1. EDUPLINK Bluetooth 5.0 Waterproof Bluetooth Speaker. 2. USB charging cable. 3. 3.5mm AUX cable 4. Quick Start Guide. 18 Months Warranty plus Lifetime Customer Service Makes that BUY IT 100% RISK-FREE .Watch the main video On the left in a few minutes andYou will be pleasantly surprised.