KKmoon Bluetooth 3.0 Numeric Keypad Wireless Number Pad 18 Keys Mini Digital Keyboard for iMac/MacBook/MacBook Air/Pro/iPad Laptop Tablet Smartphone It connects other devices with Bluetooth technology. Wireless transmission, fast and sensitive, up to 10-meter working range. Support automatical hibernation mode, no power button needed. Thin and compact design: 18-key wireless numeric keypad, which is handy and portable. The red indicator light is on when the device is ready for data entry. Battery operated: an AAA batterynot includedfor the keypad to work.