... of Strings with color light Item No.:TXY163559Air Guitar PRO – Infrared Ray Instead of Strings with color light Sample size:21*8 ... !!Features:Metallic Color Finishing: Metallic Black, Metallic Blue & Metallic RedInfrared Ray TransmitterSEVEN GUITAR KEYS: “C, D, E, F, G, A, & B ... with Two AAA BatteriesFunctions: Musical Instruments, Guitar PlayerAir Guitar PRO – Infrared Ray Instead of Strings