Why do my Yoyo (M)'s turn off after 30 minutes whilst music is playing?

The Yoyo (M)'s have an Auto Power Down (APD) feature. The speakers will power down after 30 minutes of inactivity. However sometimes, when the audio source level is low (e.g. phone, tablet etc.), the device will register the signal as lower than the APD threshold.

To avoid this please ensure that your mobile device's volume is increased to above 50% or more.