The Yonex Muscle Power 2 Junior (MP2Jr) Bright Yellow badminton racket is designed specifically for kids with length of 21 inches, weigh approximately 83 grams (4U), and small grip for ease of handling. It has an isometric design head based on Yonex's Isometric head shape technology to provide 32% larger sweet-spot (hitting area) than conventional badminton racket to help the young players hit the shuttlecock. The Yonex Muscle Power 2 Junior (MP2Jr) Bright Yellow is an excellent badminton racket to get young kids around 3-6 years old started to try playing badminton.

In year 1992, YONEX developed the world's first epoch-making technology in badminton ...the ISOMETRIC Square Head Shape. This YONEX development continues to sets the pace of winning play. The Isometric Square Head Shape badminton racket design provides a 32 percent larger effective hitting area than a conventional oval shape badminton racket. Also, unlike a conventional badminton racket with main and cross strings of varying length, the Isometric Square Head Shape equalizes the length of main cross strings in the string-bed enlarging the sweet-spot all around for more consistent shot accuracy, even on off-center hits.