BYD S6 Owner's Manual page 12

2.
Mechanical Key - used to
lock/unlock the driver door as well
as the back door.
WARNING
Pay attention to the following items
when using intelligent keys:

People with a pacemaker, a
cardiac defibrillator or other
electronic medical device should
keep away from the aerials of the
intelligent access and intelligent
key starting system, as the
electromagnetic waves may affect
the normal use of such devices.

Do not attach any object which
may block electromagnetic waves
(such as a metal sealing part) to
the key.

Do not hit other objects with the
BYD AUTO S6, S6A, S6K Owner's Manual
intelligent key.

Do not place the key in areas of
high-temperature for prolonged
periods of time, e.g. on the
dashboard exposed to direct sunlight.

Do not immerse the intelligent key
into any liquid.

It is suggested not to place the
intelligent key near any device which
may produce electromagnetic
waves, such as a mobile phone.
Use of the mechanical key
Anti-theft system 1-5