Feature: 1. WIDE USAGE: This ball possession display is suitable for practice matches or competitions such as basketball, badminton, table tennis, volleyball, tennis, etc. 2. EASY TO OPERATE: The ball possession converter is easy to operate, both button and toggle switch can control the arrow direction. 3. HIGHLY BRIGHT: The electronic possession arrow adopts LED light source, with high brightness, and large screen, can be seen clearly by people. 4. MULTIPLE USE METHOD: The display screen can be plugged in for use or powered by three 18650 lithium rechargeable batteries (not included). 5. ALUMINUM ALLOY SHELL: This basketball possession indicator adopts aluminum alloy shell, which is sturdy and light, ensuring service life. Specification: Item Type: Ball Possession Indicator Shell Material: Aluminum Alloy Model: A30B Power Supply Method: DC 5V or 3 x 18650 Lithium Ion Batteries (Not Included). Package List: 1 x Ball Possession Indicator1 x Base1 x Plug1 x Power Cable2 x Punch Free Wall Studs2 x Hanging Hook6 x Screw2 x Anchor