Size
10 meters 80 lights-1.7cm crystal ball-3AA batteries
6 meters 40 lights-1.7cm crystal ball-3AA batteries
10 meters 80 lights-1.7cm crystal ball USB type
6 meters 40 lights-1.7cm crystal ball USB type
3m/9.84ft 20 lights -- 3AA batteries (EXCL.)
3m/9.84ft 20 lights--USB type
1.5m/4.9ft 10led 2AA batteries