What is the talk time of my Jabra Pro 9400 headset?

See the following table for talk times for the Jabra Pro 9400:

*Wideband describes sounds that are within a frequency range between 150 and 6800 Hz. Wideband is typically used with wideband desk phones and softphones and offers an almost natural speech experience. Wideband requires higher power usage and therefore, uses more battery.

**Narrowband describes sounds that are within a frequency range between 300 and 3400 Hz. Narrowband is typically used with desk phones.