Motorola ME4851 - Manual (Page 59)

Green light flashes quickly, Wireless Headset is of f-hook / in use
every 1 second
Green light flashes following
Incoming call/Paging from the base
ring cadence
Green light flashes slowly,
Wireless Headset is on-hook / in standby mode
every 5 seconds
No lights are on
Batteries are not installed /
Batteries are too low
58
Using Wireless Headset