1,high quality materials. 2,durable in use. 3,perfect in workmanship Product:keychain,solar keychain,promotion keychain,solar torchMaterial:ABSSize:6*3.5*1.1cm Weight:20gCharging Time: around 5 hours with the strong sunlightDischarging Time: 2 hoursProduce Life: 100.000 hours Solar Life: 5 yearsBattery: 3.5V40MA Ni-MH BatterySolar Pannel:4.5V10MA amorphous silicon solar panels