Fits most standard elongated toilets. Will not fit round toilets nor french curve toilets. Please check with your toilet before purchasing. Various wash modes – Posterior Wash is for His/Her Back; Feminine Wash is a gentler, wider wash for her front; Turbo Wash is the strongest, most concentrated wash for His/Her back; oscillation for all wash modes; Does not include an air dryer. Choose the SmartBidet functions to match your needs and it becomes default setting once they are set.