New even better V4 Plus plugs. Ships with 1 set of batteries preinstalled. So for the first use, just unscrew the plug and pull the plastic tab. Playaboule patented product, exclusive New Design V4 only ( Replaces older V1, V2 and V3 versions ) from Playaboule. Lighted bocce ball set for the beach, backyard, camping. Very durable, can be banged together without effecting the balls or electronics. Drop tested 20ft. Light up bocce ball set with LED is the only US Bocce Federation official sized 4.2 inch dia (107mm) glow (LED) bocce balls developed in the USA. A little lighter than a real competition bocce ball as they have to be or the light won't shine through. Following features are not all not all available in any other lighted bocce set. External recessed push button switch (don't need to screw in/out) for day and night use without having to remove the batteries, water and sand/grit resistant seal, only Playaboule has 3 light modes, solid on, slow flash and pulse built into switch, quick release battery enclosure does not require a screwdriver, US Bocce Federation regulation size 50mm (2 inch) target ball (pallina), heavy duty carry case, rules, 2 x simple measuring devices, 1 set of preinstalled batteries. Spare parts available for individual balls if you loose one, or plugs , bags, batteries etc. So you can always upgrade your set if you need to, even years later.