Display large LCD screen: 53.9 x 47.1mm. Mode game 1 and game 2. Feature time and date function. Alarm function. Game function. Sound hint. Million puzzles for you to conquer. Power control at game mode, auto power off after 8 minutes without operation/manual power on and off. Power supply 2 x AAA alkaline batteries (not included). Size (L)72, (W)116, (H)21mm. Weight 83g (without battery).