TM***1: Specifications: Single Mode High brightness LED power: 5W Input Voltage: 3.3V - 6.5V Battery or DC adapter operated. Using SZTOPMET LED driver, above *-A output current capability, **0% tested to ensure high reliability. Perfect zero current reverse polarity protection. Perfect rectangle brightness. Ultra long battery working time, batteries last *5% longer time comparing with the similar products in market. Shock/Recoil Proof Low Voltage Protection in 2.7V/1Cell Li-ion MTBF: >**0, **0 Hour Dimension: D*0.6**1.0mm Brass Heat Sink No Reflector No Head Gap TM***5: Multi Mode: **0% constant on / 5% constant on/ Strobe Other information is the same as TM***1