How do I power on my MH40 Wireless Gen 2 Headphones?

Press Power/Pairing button once to power ON/OFF. (Note: Battery level will be displayed at startup via the battery indicator LED.)

When you first open your new headphones, and before listening, please be sure to charge them for at least 15 minutes and download the M&D Connect App to check for firmware updates.
Download on the App Store Get it on Google Play Tencent

To conserve battery power, headphones will power OFF after 30 minutes of inactivity. This setting can be adjusted in the M&D Connect app.