[OFFICERUNNER DISCONTINUED] [DW PRO1 DISCONTINUED] The OfficeRunner has the ability to work in Narrowband and Wideband. Most US Phones are Narrowband but the headset will work in either setting. Wideband mode the headset has up to 8 hours of talk time, typically a longer range, and will sound better on phone calls and the computer mode. Wideband mode provides a stronger link with the mic, which decreases the battery life. Narrowband mode the headset has up to 12 hours of talk time but may get a slightly reduced range. Narrowband is sufficient in most office environments. If they are having a range or static issue, you can always adjust the settings. Wideband/Narrowband is DIP SWITCH 5 on the base. UP = Wideband. DOWN = Narrowband.