AmerTac - Zenith ZB310 3-Device Big Button Universal Remote Silver/Black finish to match hardware Oversized 10 mm entry keys for ease of use 128K micro, over 3700 codes Advanced functions for DVD, SAT, CBL Limited lifetime warranty Oversized 10 mm entry keys Advanced keys for DVD and SAT/CBL functions Operates most digital TV set-top boxes Requires 2 AAA batteries (not included)