Audio & Alerts · Menu 25
VOX hang time — how long TX stays active after voice drops, preventing rapid cycling.
MENU on the radio to open the menu.25: VOX Delay.MENU again to enter the setting.MENU to save, or EXIT to cancel.Squelch— Squelch threshold — higher values require stronger signals to open the audio gateRX Save— Battery-saver ratio — duty cycle of receiver active time vs sleep time in standbyVOX Switch— Voice-activated transmit — automatically keys PTT when microphone detects speechVOX Level— VOX sensitivity — how loud audio must be to trigger voice-activated TXTX OVer Time— TX timeout timer — automatically ends transmission after this duration to prevent accidental long keydownsSee the full RT-900 menu reference for all menu items.