1. switch win/mac mode

  Fn + LALT, hold

2. fn mode

  $ echo 2 | sudo tee /sys/module/hid_apple/parameters/fnmode

3. in wireless + adapter: use the "game" mode, less lag.

  Fn + G

4. turn off HW repeater

  Fn + [ / Fn + ]  , cycle until it blinks once