Press and hold the GREEN button on the CK3000/DriveBlue unit for 2 seconds. Then the call history is displayed. Select the number you want to call.
Dual call:
A 'beep' is played for the second incoming call.
Push the red button to pick up the second incoming call. The first call is put on hold. Push the red button to hang up the active call, and get back to the first call.
You can also manage the two calls from your phone, and switch between the calls.
Private mode:
Not available on this device.
Auto Answer:
Not available on this device.
Adjusting the volume:
Use the arrows on the side of the handset to adjust the volume of the conversation.