Kwanwa Recordable Anti Bark Collar With Rechargeable Battery,Training Dogs By Recorded Voice 8 adjustable levels of sensitivity for small,medium,big,large dogs 7 repeated correction levels with voice or/and electronic stimulus Automatic safety shut-off: to protect the dog, the device will automatically reset and stop working for 2 minutes when the continuous stimulus reaches the 7 levels 9 seconds voice message can be record and used as the warning voice With Long-life rechargeable battery, USB charging cable,operating guide and 1 year warranty included