SportDOG NoBark Electronic Collar - The SportDOG Brand NoBark SBC-10 is easy-to-use, effective, and customizable with 2 modes of operation: Progressive Correction and User Select. Progressive Correction starts at the lowest level of static stimulation and increases each time your dog barks. After 30 seconds of quiet, the collar will reset back to the lowest level. The User Select mode, where you manually choose the correction level, is designed for those high-drive dogs who are unaffected by the lower levels of static stimulation and tend to bark through the first levels of Progressive Correction. For dogs 8 pounds or larger with neck sizes 5in - 22in Rechargeable lithium-ion battery Charge in 2 hours, last 200 hours per charge 10 levels of static stimulation with 2 programmable modes