Features: 1. The sensitive built-in microphone offers excellent amplification. 2. Great performance: Helps you hear sounds clearly and loudly, whether you're indoors or outdoors. 3. Fits comfortably: Behind the ear and can be used in either the left or right ear. Description: Elegant shape design, clear voice sound. Perfect for listening to TV, movies, theaters, live music, etc. Specifications: Maximum sound output: 110 5dB Sound gain: 30 dB Total harmonic distortion: 10% Frequency range: 300-4000 Hz Input noise: 40 dB Working voltage: 1.5V Working current: 4mA Color: Multicolor Package includes: 1 * Digital hearing amplifier 4 * Earplug 2 * Battery 1 * Brush 1 * Cleaning stick for earplug 1 * Anti-seismic package 1 * English manual 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 measurements.