The sound system completes the symphony for the senses when combined with the dazzling realistic flame effect of electric fireplaces. This small and lightweight unit generates pop and crackle sounds to simulate the sound of a real wood fire. It has a manual on/off operation and three manual volume settings (high, medium, and low). Requires 3 AAA Alkaline batteries (included). Product dimensions: 2.5" W x 3.4" H x 0.9" D.