Play ball with your pooch even after the suns gone down with this light up dog ball rechargeable by usb theres no need or batteries simply charge via usb and your ball will stay lit for up to seven hours long lasting and tactile for your dogs mouth this sturdy ball lights up green when touched lightly for 30 seconds at a time and automatically goes off when not in use saving on power to activate simply use a coin to twist the cap off revealing the onoff switch and the usb charging por