Uniden BTSC1500 English Owners Manual - Page 12

 To use last number redial on the second phone, press and hold Volume Down until you hear a beep (about 2 seconds).  To activate voice dialing on the second phone, press and hold Volume Up until you hear a beep (about 2 seconds). Troubleshooting and Maintenance If you have problems with the travel kit, see the suggestions in the following table. If these don't help, contact customer support (see the front cover for contact information). If... The travel kit won't turn on. The travel kit won't pair with my phone. Try... - Charging the battery completely. - Making sure your phone is in pairing mode. Check your phone's manual for instructions on Bluetooth device pairing. - Turning the travel kit off. Wait at least 10 seconds, then turn the travel kit on and try again. - Resetting the travel kit (see page 11). - Making sure your phone supports the Bluetooth headset profile or hands free profile. 12