Sleuth Ball by Iarvel Magic

Effect:

• A refined wooden box is opened to reveal five resin balls in sequential arrangement - four white and one black.
• The magician then turns his back or even blinds his eyes.
• Each of five audience members takes a ball, and the magician already knows who has taken the black ball.

Features:

• Long-press on/off setting.
• Suitable for stage and hall sizes.
• Dual display with vibration and light.
• Physical induction trigger, with one hundred percent accuracy.
• Long communication distance and standby time.
• One year warranty.

What you will receive:

• Five high-quality black and white balls.
• One specially crafted wooden box.
• One receiver.
• Associated accessories.