Beep Baseball Bases are audible baseball bases designed for use by beep baseball players who are blind or have low vision. These audible bases are vinyl-covered pylons with sound devices that emit a buzzing sound. The loudness of the buzzing sound is adjustable. Bases come in a regulation set for beep baseball. POWER: Uses rechargeable batteries. DIMENSIONS: The bases are 48 inches high and 8 inches in diameter. WEIGHT: 5 pounds.