If your old remote is not working, then first download Mi Remote mobile app and run it on TV and go to Settings and see the option of Remote and Accessories. If this option is available in your TV then only this remote will work, otherwise it will not work. 100% Best Quality Replacement Remote Control for Mi Smart TV with Bluetooth Voice Command. COMPATIBLE MODEL NO:- L32M5-AL L40M5-5AIN L43M5-AN L43M4-4AIN L50M5-5AIN L55M5-5XIN L65M5-5SIN This remote will work only in 32 inch TV, this remote will not work in 42 inch TV. For Pairing to LED TV, Please use new Alkaline Batteries.(Not Included Battery)