GooDGo&reg; Anti-Bark Stop Barking Electronic Shock and Vibrate Dog Training Collar Good Anti-barking collar for Small, Medium & Large-sized dogs Shock level is fully adjustable. It is totally automatical, and very Easy to use Three functions: Sound Warning, Electic Shock and Vibration. It is worth more than the price The best static impulse can quickly and effectively curb the improper deeds of the pet Dimension: 65 x 30 x 34 mm(L*H*W). Weight:3.49oz/99g. Collar length: adjustable design (maximum 57cm approx.)