Califone 1210AVPS 10-Position Stereo Jackbox with Volume Control; 10 1/4" Learning Positions, Each with Individual Volume Control Large Enough for Most Groups - Ten 1/4 inches learning positions, each with individual volume control large enough for most groups - Rugged ABS plastic casing for durability and school safety - Permanently attached 6 feet cord with 1/4 inches and 3.5mm plugs connects with media players - Silver plated contacts prevent crackling sound heard with other jackboxes when connecting - Skid resistant pads at each corner will not mar or scrape surface, Two predrilled holes to permanently affix jackbox