Out of Range WarningIf go out of range of the base, you will hear three low tones. You will hear a single mid tone when you come back in range of the base. If you press the call control button while out of range from the base, you will hear three low tones for the failure to make a link.If you are on a call and go out of range from the base, you will not be able to hear or talk to the other party until you come back into range of the base. If you remain out of range for more than 5 minutes the system will drop the call.Low Battery WarningIf you will hear a repeating single low tone every 15 seconds the battery is low. You should recharge the headset immediately.Mute WarningWhen you mute the headset you will hear three high tones. These tones will repeat every 15 seconds while mute is active.When you unmute the headset you will hear three low tones.