Features: Small device with chrome-plated housing, sturdy and durable. C-C , with marked openings for each note. Provides a reference for musicians without absolute . Great for any choir teachers, or groups doing a capella. Specifications: Product size: 7 * 6.5 * 1cm / 2.8 * 2.6 * 0.4in Product weight: 40g / 1.4oz Package size: 14.5 * 9 * 2cm / 5.7 * 3.5 * 0.8in Package weight: 50g / 1.8oz Package List: 1 * Pie