LIGHTS UP WHEN YOU PUNCH: The built-in LED lights up on impact and turns off when idle, adding a satisfying flash of feedback to every jab. SET OF 4 WITH 4 EXPRESSIONS: One pack, four moods — shocked, angry, relaxed and speechless faces to match any workday; keep the set on your desk or share one with each coworker. MINI 4.41 IN SIZE: Measures 2.76 x 2.76 x 4.41 inches, a compact desk toy that sits neatly beside monitors, keyboards and notebooks.