This remote switch is designed to reduce camera shake to an absolute minimum. It is a perfect choice for taking long exposure photos. The remote has a two-stage release button, half-press to focus, fully press to trigger the shutter and take a photo. For long exposure, please press the release button fully and slide it into the locked position. The shutter will stay open as long as the shutter release button is locked. To unlock the shutter, just slide the release button back to its original position. This remote is powered by camera, you don't need to install a battery. Package includes: 1 x Remote Switch 1 x 70cm long camera connection cord 1 x 130cm long extension cord Compatible with Canon EOS Rebel Series DSLR cameras: EOS Rebel XS(1000D)/T3(1100D)/T5(1200D)/T6(1300D)T7(1500D) EOS Rebel SL1(100D)/SL2(200D)/SL3(250D)/XT(350D)/XTi(400D)/XSi(450D)/T1i(500D)/T2i(550D)/T3i(600D)/T4i(650D)/T5i(700D)/T6i(750D)/T6s(760D)/T7i(800D)/T8i(850D) EOS 60D/60Da/70D/77D/80D/90D Compatible with Canon Mirrorless Cameras:EOS RP, R, R6, M6, M6 Mark II, M5 Compatible with Canon Powershot cameras: Powershot G10/G11/G12/G15/G16 Powershot G1X/G1X Mark II/G1X Mark III/G3X/G5X Powershot SX50 HS/SX60 HS/SX70 HS Compatible with Pentax cameras: K1/K3/K3 II/K5/K5 II/K5 IIs/K7/K30/K50 K10D/K20D/K100D/K100D Super/K110D/K200D/K500/645D/645Z ist/ist D/ist DL/ist DL2/ist Ds/ist DS2/MZ-6/MZ-L/ZX-L Compatible with Samsung cameras: GX-1L/GX-1S/GX-10/GX-20/NX10/NX100/NX5