The device is small and portable which can be used indoors and outdoors-The device uses solar energy without electricity bills-The device has strong penetrating power , large irradiation range and long service life-The charging effect is best when the device is placed at a 45 degree angle facing the sun-USB charging can also be used when there is no light-The device can be used as a mobile power bank to charge other devices-The flashing function can be turned on to call for help quickly-Model : AB-TA147-Number Of LampBeads :72-Charging Time 4-6hours-Water Proof Grade : IP63-Solar Panel : 2.8W-Battery Type : 4000mahPackage Weight: 717gPackage Dimensions: 17cm x 7cm x 22cm