Model Number: SA-512 Brand Name: SADES Key Specifications/Special Features: Features:Overall design in line with somatology, adaptable headband to bring you comfortable wearing High-sensitivity microphone up to clear, cute and durable High-quality cord in single-line design, to improve ease of useSpecifications:Loudhailer diameter: 30mm Cable length: 1.8m (approximately) Frequency range: 20 to 20,000Hz Sensitivity: 114 ±3dB at 1kHz Impedance: 32Ω ± 15% Input power: 20mW (maximum) Microphone: 6 x 5mm condenser microphone Sensitivity: -54 ±3dB Plug: 3.5mm Nickel platedLoading details:Carton measurement: 74 x 49 x 44cm Quantity/carton: 100 pieces Total quantity in 20ft GP: 13.650 pieces