Garmin Varia UT800 Smart Headlight Version:Trail Edition Xero A1 utilizes red LEDs

Xero A1 utilizes red LEDs while A1i gives you the option to use red or green LEDs

and daylight times

and off-grid communication features

Targeted explosive strength mode

Garmin Catalyst

Garmin Varia UT800 Smart Headlight Version:Trail Edition Xero A1 utilizes red LEDsRide safer with the Garmin Varia UT800 high intensity cycling headlight for urban and trail use The Garmin Varia UT800 smart headlight automatically adjusts beam intensity based on speed1 to give you the lumens you need for up to 4 hours, so you can ride with confidence. PRODUCT DETAILS WORKS ALONE OR PAIRS WITH EDGE When paired with your bike computer, the headlight automatically adjusts based on speed and ride profile. And you can control the lights