Sleepping Eyes Mask Bluetooth Module for Eyes Mask Sport Headband

We have several version for choices. 

Verion 1: Bluetooth modul with white noise ( No TF card )

Verion 2: Bluetooth module with TF card, can put your content into it, such as music, lessons, white noise, etc.

Verion 3: Bluetooth module with bigger battery (300mAh), working time can be 35h.

We are professional headphone manufacturer, any requirement, pls feel free to contact us!