Shenzhen Grand Time Technology Co. ltd F25 사용자 설명서
2.
Take the battery pack out by pulling it upwards.
Antenna Installation:
Hold the bottom of the antenna; screw it into the unit clockwise tightly.
Notice: Do not hang the keychain on the antenna, it will cause damage to
the antenna and degrade the performance.
Back Splint Installation:
Put the back splint onto the slot above the battery compartment if necessary.
This will make it easier to carry.
Notice:
◆ Take the battery off the unit; focus the latch groove of the back splint on
the mounting rail above the battery compartment. Slide the back splint
downwards until built-in.
◆ Take the battery pack off before taking off the back hook, then press