• Amplifies your voice and saves your throat when you have a difficult time speaking loudly enough
• Built-in 600mAh lithium battery, you can use it for a long time with fully charged
• The headband is flexible to adjust the position, can be adjusted to fit most people's head sizes, comfortable and durable
• Very suitable for teachers, tour guides, promoters, fitness and yoga instructors, etc
• Ideal for teaching, fitness guidance, public speaking, trainers, stage performers, outdoor live, etc

Specification:

• Pickup way: condenser
• Frequency range: 630Hz~690KHz
• Frequency response: 80Hz~15KHz
• Mode: Cardioid
• Sensitivity: -85dB
• Impedance: 1000Ω±30%
• Receiving distance: 50m
• Frequency point: 66
• Audio output level: 0-0.5V