ET 300 Mini Educator Remote Trainer Black Series Educator Collars another cool feature of this Choose the size:Small (53 x 64 cm) another cool feature of this remote training collar is you can switch it to an Automatic Anti Bark Collar when your dog causes nuisance barking in your neighbourhood The training kit also includes the EZ 900 receiver collar that receives the signal from the remote transmitter and can deliver adjustable stimulation levels from 0 100 with its COS (Control of Stimulation) Technology Fully Waterproof And Submersible Collar And Remote It has an LCD Display with a blue backlight for the night use and to ensure that your batteries are fully charged that allows you to easily set your levels for your training