Compatible with modelsMicrosoft Surface Go 3/Surface Go 2/Surface GoTechnical specsBluetooth version: BT 5.0Operating distance available: 10 meters (30 ft.)Modulation system: GFSKOperating Voltage: 3.0-4.2VWorking current: <2.5mAStandby current: <0.3mASleeping current: <40 µ AStandby time: >100 daysWorking time: more than 35 hoursCharging time: 2-3 hoursLithium battery life: 3 yearsKey strength: 80±10gKey life: 5 million strokesOperating temperature: -10?- +55?Charging port: Micro USB/TYPE C charging port 5V