This is the BigBlue Combo Pack AL450NM-II Tail & AL1800NP Black & Easy Clip Rainbow Features: AL1800NP-II: 1800 Lumens at 6500K color temperature A narrow 10Adeg beam angle with a soft edge Four power settings AL450N-II Tail: 450 Lumens at 6500K color temperature A narrow 8Adeg beam angle with a soft edge Tail button switch with battery indicator Specs: Package Weight - 2 lbs Lumens - 180 Lm (Level I), 450 Lm (Level II), 900 Lm (Level III), 1800 Lm (Level IV), 450 Beam Angle - 10Adeg Burn Time - 2 hrs (level IV), 4 hrs (level III), 8 hrs (level II), 20 hrs (level I) Light Source - XML LED Power Source - Rechargeable Li-Ion 26650 Battery Color Temperature - 6500K (Cool White) Maximum Depth - 100 Meters Tested Housing Material - Anodized Aluminum Alloy Battery Model: BATCELL26650 Charge Time: 5-6 Hours The AL1800NP-II offers great features including the four-level push-button on/off switch, and rechargeable 26650 lithium-ion battery. This is the perfect light for general purpose diving or technical diving.