Neewer DSLR Camera Shutter Release Wired LCD Timer Remote Control Intervalometer Time-lapse Photography Device Compatible with RM-VPR1 Multi-Terminal Plug for Select SONY Alpha Models Main functions: Self-timer, interval timer, long exposure timer, exposure count control, remote switch function. The remote switch function can be achieved without battery power supply. The remote cord is portable and durable for outdoor shooting. The shooting, timer shoot and time exposure are operable easily at night or in dark environment with the backlight equipped LCD screen. The exposure count function can set easily.