Model NO : K-13 Description:1 LED Aluminium alloy Keychain Function : Tail revolving switch Discharge time : 12 hours Battery type :3 pcs 1.5V LR41 button cell Bulb type : 1 pcs f5mm white light LED Distance of visibility : over 2m Product size : φ12.03mm×43.95(L)mm Packaging : PVC Sack LED life : over 50,000 hours