Model:GS601-1

Function:

Vibration massage
The lowest sound bubb

Model:GS607-1

Function:

Bubble impact
Vibration massage
Soothing infrared light dots
Heating up water
Water jet massage
Massag

Model:GS606-4

Function:

Vibration
Strong Bubble 
Keep warming 
Central massage roller

Model:GS501-1

Function:

Heating up to 45 in winter
Single side heating up
Use safety Li-polymer battery
Two temperature setting
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