Headphone amplifier. This headset uses more advanced technology and chips, and the sound processing and amplification are smarter. It has a noise reduction function to that you can hear the sound clearly in , which is suitable for the elderly. Rechargeable. This is a USB- headphone amplifier that can be placed in the charging compartment for wireless charging, without frequent battery replacement. The headphone amplifier can be quickly in 2 hours and has a working time of up to 30 hours. This is a perfect all-weather headphone amplifier. Small and comfortable. This headphone amplifier adopts ergonomic design, fits tightly in the ear canal, looks natural, is not easy to fall off, and is comfortable to wear. The small and headphone amplifier is convenient to carry to any occasion. Easy to operate. There are no complicated buttons or modes. Just touch the button to turn on. When changing the volume, just touch the fingerprint. Simple and clear, very suitable for the elderly. Due to different factory batches, there are slight differences in the color and appearance of product accessories, but it does not affect normal use Colour:Photo Color Material:ABS Package Contents: 2 x earphones 1 x charging case 1 x Type-c charging cable 1 x Dc2.0 charging cable 2 x brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.