JR-FT5 model Version of Bluetooth: BLE5.3 + BT3.0; chip: JL7012/F6 64 MB of memory IP68 is the waterproof rating. BT range: roughly 10 meters Material for the screen: TFT 1.83" screen with 240 x 286 resolution Capacitive touch control is the touch control mode. 300mAh is the battery's capacity. Approximate charging time: 2.5 hours About 15 days is the standby time (connected). Average usage period: seven to ten days Magnetic charging is the mode of charging. Input for charging: 5V 500mA Dimensions overall: 36.5 x 44.7 x 11.5 mm Silicone is used to make the band. Size of the band: 219 x 20 mm Wrist sizes that fit: 50mm–220mm Body material: PC+ABS base shell; zinc alloy top shell About 50g in weight