I-SMILE 3PCS Replacement Bands with Metal Clasps for Fitbit Alta(No tracker, Replacement Bands Only) Collapsible to half its size, stored easily in glove box, backpack or auto emergency kit 3 Light modes: High, Low and SOS strobe. Provides up to 12 hours of use in low-brightness mode, 5 hours of use in high-brightness and 8 hours in SOS strobe. Floats in water and can be used to store small items like cell phone, keys, first aid items or medicine A wide range:solar camping light,emergency lights,desk lamp,portable hand lamp,night lighting,camping lantern,fishing lights ec Solar energy is stored in the included Lithium polymer Rechargeable battery which also can be powered by USB cable