JJC ES-898 Easy Switch Controller allows you trigger your camera through your smart-phone. Just use a JJC Shutter Release Cable (separate purchase required) to connect this controller and your camera. Then connect our Easy Switch controller with your smart phone through blue tooth. You are ready to take perfect photos in three modes: Manual Shot, Timer Shot and Scheduled Timer Remote. The DELAY time, BULB time and INTERVAL time can all be set from anywhere to 99hrs 59min 59s 900ms. The number of exposures can be set from 1 to 999 shots or infinite. The unique scheduled timer remote mode allows you set six different timer exposure plans to meet your needs. With this controller, your iPhone, iPad, iPod touch and Android devices will function as a wireless timer remote to control your digital cameras. This controller also acts as a wire remote switch. It allows you half press the shutter button on the controller into focus, full press to take a photo.