Bluetooth Version: BLE 5.3 + BT 3.0 Battery Type: Lithium Polymer Battery Capacity: 300mAH Display size: 1.83 inches Resolution: 240 * 284 pixels Charging Time: About 2.5 Hours Working Time: 3 to 5 Days Stand By Time: 15 Days Multi-Language Support (Arabic Included) Product Size: 52mm*40mm*10.5mm