Features : 1.The sensitive built-in microphone:offers excellent amplification. 2.Good performance:Help you hear the sound clearly and loudly, whether indoors or outdoors. 3.Comfortably fits:behind the ear and can be used in either left or right ears. Description : Elegantshapedesign,clearvoicesound.Ideal for listening to TV, cinema, 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 Included: 1*Digital Hearing Amplifier 4*Earplug 2*Battery 1*Brush 1*Earplug cleaning stick 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 measurement.