Features: Power Supply: 2 x AAA batteries (Not included) This product adopts the techniques of fast code locating, it can copy the codes, functions from your original IR remote controls It provides 3 devices/ 126 keys for learning, you can choose to learn the functional keys optionally for your home devices It's the best choice in usage for multiple appliances with permanent memory after simply learning setting up Application: TV, SAT, DVD, VCD, CD, HIFI, CBL, STR-T and other infrared devices Package Included: 1 x CHUNGHOP L336 Learning Remote Control 1 x Setup Guide