Specifications:Material: PlasticType of battery: 2*AAA batteries(Included)Unit Dimensions: 4.3*4*2.5in / 11*10*7cmLCD Screen Dimensions: 1.1*0.5in / 2.6*1.3cm)Package Dimensions: 4.7*3.0*4.3in / 12*7.5*11cmInstallation:According to the form of the tank, there are two install methods for choice:a. Fix the feeder to the tank wall and tighten the screws.Separate both sides of velcro, then paste the velcro on the bottom of feeder and another side on the tank cover, then fish food will drop down during rotation.Clock Setting:1.For the first time use, please align the feeder’s time and the local time first; 2.Press the "SET" button and the "HOUR" will flash; then press "ADJUST" to set the "HOUR";3.To set the "MINUTES", press "MODE" the "MINUTES" will flash and then press the "ADJUST" to set the "MINUTES";4.Once the correct time is displayed, press "SET" to save the settings.Notice:a.Please avoid twisting the feeding box by hand;b.For the first time use, please align the feeder’s time and the local time first;c.If LCD is displayed abnormally after batteries completed, please notice that whether the batteries are placed correctly, then pay attention to the power of batteries;d.If you can not find the battery compartment, just remove the holder from feeder and you will easily find it.Package Includes:☞1 x Automatic Fish Feeder☞2 x AAA 1.5V Batteries☞1 x User Manual