Sleeping soundly with zero sensation Born for sleep Strong sound insulation and noise reduction, long-lasting wear without pain Food grade silicone materialPacifier silicone is also being used Healthy and environmentally friendly, non-, error free, and odorless use Hign-concerned Chemical: None Category: Earphones & Headphones Active Noise-Cancellation: Yes Volume Control: No Vocalism Principle: Other Wireless Type: Bluetooth Communication: Wireless Style: Wired in-ear headphones Color: B Navy Blue Material: Silicone Package Contents: 1 * Carry Case 2 * Ear Plug 4Pair * Replacement Ear Caps 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.