Noise-reduction keycap technology Retro-style round keycaps Compact keyboard layout with 78 keys 2.4GHz wireless connection with USB nano receiver (stores in battery compartment when not in use) LED indicator for Caps Lock and Battery Status USB plug and play Windows, Mac and Chromebook compatible 11.57 in L x 5.72 in W x 0.95 in H (29.3 cm x 14.5 cm x 2.4 cm) What's in the Box? 1 Compact Wireless Keyboard, 1 USB nano receiver, 2 AAA batteries