The Nebo Einstein 400 is a low-profile rechargeable headlamp with two light sources controlled by separate buttons. The spotlight gives Turbo (400 lumens in 35-second bursts, 133 m), High (250 lumens, about 45 minutes) and Low (50 lumens, about 1.7 hours), while the C.O.B floodlight gives 100 lumens of white light or 15 lumens of red for up to 8 hours, handy for reading maps or working close up without dazzling others. It is compact and light, with an adjustable headband, and is IPX4 water resistant. It runs on an included 651730 3.7 V 300 mAh Li-ion battery that charges by micro-USB. A good everyday headlamp for camping, hiking, fishing and work in poor light. In the box: headlamp, rechargeable battery, micro-USB to USB cable and manual.