Specification:Language: Russian, English Operating distance: 10mControl plan: CAPSWorking system: For Windosws, Android, IOS systemOperating voltage: 3.0 - 5.0VOperating current: < 2.0 mAStandby current: 0.3 - 0.5mASleep current: < 25 UACharging current: 220 mACharging time: 4 hoursLithium battery capacity: 120maUninterrupted working hours: 40 hoursStandby time: 60 daysLithium battery life: 3 yearsKeyboard life: 5 million timesWorking temperature: -10 - 55Size: Approx. 248mm * 150mm * 5mm / 9.8 * 6 * 0.2inchNumber of keys: 80Color: Black Package List:1 * KeyboardInstructions for use:1. Push the OFF switch on the lower right side of the Bluetooth keyboard to ON, then the blue light is on, then the keyboard starts.2. Open the device, find - Settings - turn on wireless and network - turn on Bluetooth - search for nearby devices - search for the Bluetooth keyboard and click on the connection.3. The device screen prompts - Bluetooth pairing request - enter Bluetooth password XXXX to pair "Bluetooth keyboard", enter the number displayed on the screen on the Bluetooth keyboard and click the Enter key, the connection is successful.4. Switch system: FN+ for IOS /windows /AndroidIf you find that there is no response, please use the micro-USB cable to connect to the computer's USB port to charge it.