User's Manual

PM451 Android 9.0 User Manual

Safety Information

Pleas

e note PM451 is battery-embedded design with a removable battery. Unauthorized personnel are

strictly prohibited from disassembling the device.

In case your device does not work as expected, you are strongly recommended to restart it by pressing

and holding the power button for at least 12 seconds until the startup screen appears. If your phone has

encountered a serious error and cannot be recovered, you should reset your phone to factory settings. For

more details, please refer to Factory Data Reset.

Head(Face) Operation

This device was tested for typical Head(Face) operations with

the front of the device kept 0.39 inches (1 cm) between the

user's face and the front of the device. A minimum separation

distance of 0.39 inches (1 cm) must be maintained between the

user's face and the front of the device. Any accessories

containing metallic components may

not be used. Head(Face)

accessories that cannot maintain 0.39 inches (1 cm) separation

distance between the user's Face and the front of the device,

and have not been tested for typical Head(Face) operations

should be avoided.

PROTECT YOUR HEARING

To prevent possible hearing damage, do not listen at high

volume levels for long periods. Exercise caution when holding

your device near your ear while the loudspeaker is in use.

Caution

: Factory data reset will erase all personalized settings and data saved in your phone,

such as Google account, apps, user data, etc. And factory data reset cannot undo.