【4 Training Modes】: With Beep, Vibration, Shock and LED Light 4 mode. The dog collar stimulation can be adjusted with 0-99 levels of customization. 【Easy Operation】:has a user-friendly interface to operate. Three simple buttons to change working mode freely, especially good design for blind man. 【800yds Remote Range】:Operates within a distance of 800yds.The range will vary depending on terrain, weather, vegetation, as well as transmission from other radio devices. 【Multi-Dog System】: This system can be used to control 3 dogs with one transmitter just need to purchase additional receiver collars and add them to your system. < p>【Easy and Quick Sync】: Quickly receive the signal from the training collar within 10 seconds. Ingenious design of more than 3000 different identity codes that prevents conflicts with other similar devices.