Sleep Optimization Mask

Product information:
Material: Super soft
Purpose: Anti-light radiation
Specification: Enjoying black
Bluetooth version: 5.0 plan
Bluetooth call: full duplex
Wireless distance: barrier-free 10 meters and above
Frequency range: 2.402GHZ
Talk time: 15 hours
Standby time: 180 days
Receiving sensitivity <-80dBm
Rechargeable battery: 150 mah
Charging voltage: 5V 0.7

Size Information:

Package:
Eye mask x1