... volume when mode is changed6. Twenty steps of light intensity, memory will recall the previous intensity when ... steps of timer, related to sound, volume and light, used for Auto-Off or Auto-On function ( ... 60,75,90 minutes), when timer end, the light, alarm/sound, volume will be off or on ... radio frequency10. Three steps of LCD backlight(full, half , off), memory will record the previous LCD brightness11 ...