The device's battery life (when in use) as given by the manufacturer. With a longer battery life you have to charge the device less often.
Sennheiser PXC 480: 50h
17. has an on-ear form
This device comfortably rests on top of your outer ears. As it doesn't block out everything from the outside world, it's preferred in places like office environments and recommended for outdoor activities.
22% have it
18. warranty period
When covered under the manufacturer’s warranty it is possible to get a replacement in the case of a malfunction.
Treblab X2: Unlimited undefined
19. has a removable battery
The battery is removable and can be replaced by the user if broken.
6% have it
20. supports Bluetooth pairing using NFC
Device supports fast Bluetooth pairing using NFC so it can communicate with other devices over Bluetooth. You can fastly pair devices without entering a code by simply holding one device next to the device with which it is to be paired.