The "Sound Plate" automatically positions the call in your mouth at the right place and angle, making calling elk easier. The Sentry Plate Single has a "Sound Plate" set at 16 degrees, which is perfect for cow, calf talk and spike bull bugles.Features: - The angle of this sound plate is set at 16 degrees, making this single-reed call prefect for cow, calf, and spike bull sounds without switching calls - US Patent Nos. 5,415,578 and 5,520,567
