650NM Red Light: ear red light therapy can emit 650nm red light, the ear canal is rich in capillaries, through the 650nm red light irradiation of the thin skin ear, the light can easily reach the blood flow place USB Design: Our red light therapy device for ears adopts USB design, you can plug the USB port directly into the mobile power supply, or plug in the appropriate adapter to start using it Easy to Use: No need any operation, no buttons, plug in the mobile power to start using. Recommended to be used 2 times a day for 30 minutes each time, once in the morning and once in the evening Easy to Carry: The red light ear therapy device is small and portable like wired headphones, you can put it in your pocket and take it with you. Convenient to use anytime and anywhere Color: White Material: plastic Package Contents: 1 x Red Light Therapy 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.