Techo Touchless Toilet Flush Kit with 8&rdquo; Sensor Range, Adjustable Sensor Range and Flush Time, Automatic Motion Sensor Toilet Flush Kit Powered by Batteries EFFORTLESS UPGRADE: Upgrading into automatic toliet without replacing the current toilet or toilet seat, AND the manual handle will be still working as a backup. Automatically flush when hands waving over the detection range. A more sanitary way to flush than using the handle. RELIABLE MOTION SENSOR, ADJUSTABLE SENSING RANGE & FLUSH TIME: Minimizing possibilty of phantom flash, only be activated when sensing motions within the detection range. Unaffected by the external environment. Easily adjust the sensor range and flush time with a screwdriver (included). Sensor range adjustment range: (0-8). Flush time adjustment range: (1-6s). EASY TO INSTALL & REPLACE BATTERIES: Simple installation taking most people less than 20 minutes. External battery design makes it easier to replace batteries. LONG LIFESPAN: The controller last for over 200,000 flushes in normal use and 4 AA batteries (included) last 30,000 flushes. RIMINDERS: The kit DOESN'T FIT ALL TOILET TYPES! Only fits with most flapper and canister toilets, not for dual-flush/ ballcock valve/ top-mount flush and pressure-assist toilets! Contact us at once if you are not sure whether our product fit your toilets! Ideal for toddlers and elderly, useful aid for people with disabilities and a convenient helper in the night! Any question with our product, please contact us!