3D version features

• Vibration massage. Quickly eliminate eyestrain
• 42 degrees Celsius hot compress function can relieve eye fatigue
• 3 massage modes
• Use USB to charge. 500mA lithium battery.
• Adjustable elastic headband, you can adjust the elasticity of the headband to fit your face, and the elastic headband is designed to fit most people's heads. 
• One-click folding. Can be carried around to quickly save storage space

4D version features

•  A full set of 4D airbags, imitating artificial massage, pneumatic massage
•  Vibration massage. Quickly eliminate eyestrain
• 42 degrees Celsius hot compress function can relieve eye fatigue
• 15 minutes synchronization function, so you don't need to worry about too much massage
• There is a Bluetooth system that can connect your phone to play your favorite music. This way you can relax during the massage 
• Answer the call. Can chat with friends during massage
• LCD display, the display is clear, even the elderly can easily see
• Five intelligent massage modes for you to choose 
• USB charging. 1600mA lithium battery. Can work long hours
• Adjustable elastic headband, you can adjust the elasticity of the headband to fit your face, and the elastic headband is designed to fit the head of most people.
• One-click folding. Can be carried around to quickly save storage space