Restomod Air’s Atmosphere App is designed for our Series II A/C Systems. This App only works with Restomod Air Haymaker II B/T, Vapir III B/T, Bantam II B/T A/C Systems. FULL CONTROL: This APP allows for full control of Fan Speed, Mode Control positions such as Dash, Defrost and Floor along with Temperature Control. CUSTOMIZATION: Change dial themes and indicator colors.