How to use q switch and f switch on lf antenna.
Q switch:

Switch to “Q=14″(range+),
Normally when you just read something for example “Lf search” Lf hid read”.etc
The reader range will farther, increase by about 30%.

Switch to “Q=7″(accurate+),
Normally when you operate some tags such as t5577 or em4305, for example “Lf em 410xwrite 1234567890 1 64″”Lf t55xx detect””Lf t55xx dump””Lf em 4x05info” .ect
Change tag data,detect tag,dump tag..etc
Especially operate with bioglass in your body, you should turn to “Q=7”
It can write or read reliably and accurately without data errors. For bioglass, data errors can be disastrous.

F switch:
Switch to “F=125”
Tune at 125khz, the 125k tag will get better range.
Switch to “F=134”
Tune at 134khz, the 134k tag will get better range.