4 Training Modes 1: Led Light, Vibration, Shock And Sound Mode Are Optional 2:Led Light Mode Helps You To Locate Your Dogs In The Dark Environment, At Dusk, Thick Foggy Condition 3:Vibration And Static Shock Mode Are Adjustable From 0-99 Levels 4:The Sound Mode Creates An Audible Warning Adjustable Soft Nylon Collar Soft Dog Collar Length Is Adjustable From 18Cm To 65Cm It Fits For Medium Large Dogs (Dogs Weight Is 8 Lb Or Above) Kindly Reminding: This Remote Shock Collar Is Designed For Building A Better Internal Communication Between Your Dogs And You, Not For Punishing The Dogs Please Treat Animals In A Friendly Way Package: 1 X Transmitter 2 X Receivers 2 X Collar Belts 1 X Charging Cable 2 X Testing Bulbs 4 X Touching Points 1 X User Manual (With Detailed Dog Training Tips) Important Safety Notices: 1 Please Dont Use This Training Collar For Aggressive Dog 2 Please Avoid Leaving The Collar On The Dog For More Than 8 Hours Per Day, And Please Try To Re-Position The Collar On The Dog Neck Every 1 To 2 Hours 3 Examine The Contact Area Daily For Signs Of Rash Or Sores If There Is, Stop Using The Collar Until The Skin Has Healed If The Condition Persists Beyond 48 Hours, See Your Veterinarian 4 Please Use Vibration Or Tone Mode First Shock Mode Is Only Recommended In Emergency Situation And Not Advised As A Form Of Positive Behavior Training Note: If The Collar Is Too Tight, Its Easy To Cause Skin Damage If The Collar Is Too Loose, The Receiver Is Unable To Work