Specification: Product name: Ultrafire C8 LED Flashlight Remote Pressure Switch Combo Material: High quality Aluminium Model of LED: CREE XM-L T6 LED Powered by : 1x 18650 3.7v battery(NOT INCLUDED) 5-mode : High, Medium，Low, SOS and Strobe. （Half press the tail button to circle modes） Size(mm) : 146( length ) x 44( head diameter ) x 25( body diameter ) Color: Black Remote pressure switch threads length: 34mm Remote pressure switch threads diameter: 25mm Remote pressure switch is compatible with this C8 flashlight pefectly, because they are produced as combo. If you purchase the flashlight and remote pressure switch separately, no body can be sure they match well. But this combo does match great, that"s why they are more expensive. Package Content: 1 x Ultrafire C8 LED Flashlight 1 x Remote Pressure switch