JW RM-E7 Wireless Remote Control For Pentax K3 II K-S2 K-S1 K100D Super 645Z K-50 WG-3 Q7 K-30 K5II K-5IIs K-01 WG-2 VS20 WG-1 Q 645D Kr K5 W90 i10 Kx K7 Samsung GX-1L GX-1S + JW emall Micro Fiber Cleaning Cloth Takes X1 3V CR2025 lithium battery Effective within +/- 30 degrees of the lens axis Dimensions: 2.5 x 6.5 x 0.5cm (1 x 2.7 x 0.2") Remotely control your zoom function Half press shutter release