Chamberlain 3850 Garage Door Opener User Manual


 
37
ACCESSORIES
C
L
O
SED
O
P
EN
374LM
370LM
915LM
395LM
990LM
1702LM
Outside Quick Release:
Required for a garage with NO access
door. Enables homeowner to open
garage door manually from outside by
disengaging trolley.
Remote Light Control:
Enables homeowner to turn on a lamp,
television or other appliance from car,
bedside, or anywhere in the home
with a remote.
SECURITY
®
3-Button Remote
Control:
Wood grain plastic case. Includes visor
clip.
SECURITY
®
4-Button Remote
Control:
Includes visor clip.
Wireless Door Control:
Push bar, light feature and auxiliary
button. Includes battery.
377LM
Extension Brackets:
(Optional) For safety sensor installation
onto the wall or floor.
373W
SECURITY
®
Keyless Entry:
Enables homeowner to operate garage
door opener from outside by entering a
password on a specially designed
keyboard. Also can add a temporary
password for visitors or service
persons. This temporary password can
be limited to a programmable number
of hours or entries. Opener can be
closed by pressing only the ENTER
button if the one button close feature
has been activated.
378LM
SECURITY
®
3-Button Mini Remote
Control:
With key ring and fastening strip.
Battery Backup System:
Provides backup power to the garage
door opener. For use with model
3850 only.
485LM
Surge Protector:
The Garage Door Opener Surge
Protector is designed to protect
LiftMaster
®
garage door openers against
damage from lightning and power
surges.
975LM
Laser Park Assist:
Laser enables homeowners to precisely
park vehicles in the garage.
Garage Door Monitor:
Security for the largest door of your
home!
Tells you if your garage door is open or
closed. Monitors up to 4 garage doors
by adding additional sensor modules.
41A5281