Bluetooth: BT5.1 Chip: Ruiyu 8762DT Screen size: 1.32INCH round Charging time: 2-3hours Usage time:3-10 days Battery capacity: 3.7V/200mAh (with protective plate) Waterproof: IP67 FLASH memory: 128MB material:electroplated fingerprint resistant mineral glass mirror APP software: RDFit Resolution: 360 * 360 Charging mode: wireless charging Control mode: full-touch screen G+F touch IC: CST816D Compatible systems: Android 5.1 or above,