wireless keyboard: Features 1. IBM PC/AT, BS/2 compatible. 2. Enhanced okays (keys for Window 23) _ Membrane contact technology. 3 4. 12 function keys. 5. Effective operation angle: 40° 6, Choose from two operating model: 0-4 fae for normal use 4.50 feet for enhance mode 7.19 address iD. §. 4A batteries, battery lite HASH approx, 400 hours. 9. kay strokes lifetime over 10 million key strokes. 10. Multi language style. 11. Snooze and sleep function. 12. Three power on/enhance/oft switch. 13.