Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 18)

Using the headphones
18 | HD 450BT
Retrieving information on the battery
charge status
When the headphones are connected to your Bluetooth device, the
battery charge status can be displayed on the screen of your smart-
phone (depending on the device and operating system used).
The Smart Control app also displays the battery charge status.
You can retrieve information on the battery charge status on the
headphones by pressing the center of the volume button 1x.
Voice prompt Meaning
“Recharge headset” The rechargeable battery is empty.
Recharge the rechargeable battery (>
11).
“More than xx hours
playtime” The remaining battery charge is
displayed in hours.
“Recharge
headset“
“More than xx
hours playtime“
ON
1x