Feature: 1. COMPACT SIZE: The earbud is small and compact, ensuring more concealed fit that no one will know you are wearing them, includes built in replaceable wax guard for service life. 2. NOISE REDUCTION: Reduce background noise while amplifying sound, allowing you to hear sound in noisy environment, consistent sound quality, and almost no whistling or feedback, can adjust the volume according to your needs. 3. CHARGING CASE: Equipped with a charging compartment, with a charging time of 2 hours and a battery life of 10 hours, the glossy magnetic charging base is safe and reliable, without the need for frequent replacement of battery. 4. 3 DIFFERENT CAPS: This kit includes 3 different sizes of earbud covers, which can be installed as needed, and the hearing earbud is suitable for the elderly and adults. 5. EARBUD PARAMETERS: The maximum sound output of this listening earphone is 115dB+3dB, with a gain of 25dB±5dB, and a frequency range of 450Hz‑3000Hz, with low distortion and interference. Specification: Item Type: Earbud Product Material: ABS Color: Black Earbud Battery: 85mAh Polymer Lithium Ion Battery (built in) Maximum Sound Output: 115dB+3dB Average Output: 105dB±4dB Gain: 25dB±5dB Frequency Range: 450Hz-3000Hz Distortion: ≤10% Frequency Range: 29dB+3dB Charging Time: 2 Hours Usage Time: 10 Hours Working Current: 2.5mA. Package List: 1 x Earbud1 x Charging Case1 x USB Cable1 x User Manual3 x Earbud Caps