MC-55AG 2 in 1 Wireless 2.4G Ultra-thin Numeric Keyboard Calculator

2.4GHz wireless transmission technology, super connection range Supports Windows OS, an ideal time-saver for data entry and accounting activities Compact, comfortable and convenient Accurate, eliminating the need to manually enter, highly improve efficiency Connect Type: 2.4GHz Wireless Battery Type: 2 x AAA Battery, Not Included System: Windows8, Windows 7, Windows XP Key Number: 29 Keys Rating: 3V – 3mA Size: 155 x 100 x 15 mm / 6.10 x 3.94 x 0.59 inch Weight: 155g / 5.47 oz