Specification Max Sound Output: 120 dB Max Sound Gain: 30 dB Harmonic Wave Distortion: f<1000Hz10%,f>1000Hz4% Frequency Range: 2503800 Hz Input Noise: 50 dB Battery: AG3 Working Voltage dc1.5V Working Current: 4mA Package Included: 2* Digital Hearing Amplifier 8 * Earplug 4* Battery 1 * Brush 1 * Earplug cleaning stick 1 * Anti-seismic package 1 * English manual Features: 1.Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. 2. Durable material: This product is made of high-quality material, durable, long service time, firm and stable in use. 3.Comfortable fit: behind the ear, it can be used for left or right ear. Provide excellent amplification effect. 4.Meticulous workmanship: The meticulous design, perfect in workmanship, durable and long service life. 5.Good performance: Whether indoor or outdoor, it can help you hear the sound clearly and clearly. Description: Elegant design, clear sound. Very suitable for listening to TV, cinema, theater, live music, etc. Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2.Please allow slight dimension difference due to different manual measurement.