[VIP The 1 year ] Index:4
Material: Silicone;
It can be connected with phone APP by bluetooth;
Built in rechargeable battery, single charge can be used for 300 hours;
USB type C, OTA function for software update;
Support online and offline sports modes;
It's easy to use, small and light grip, you can exercise your finger flexibility and grip muscles at any time in daily life.
