Dogs Anti Barking Shock Training Control Collar Trainer

For most dogs, it needs 7 to 14 days to take effect; for few dogs, it needs 4 to 6 weeks to take effect; for very few dogs, it needs longer time to take effect

Power: 2 / 3 AA battery

Dimensions: 80 x 48 x 43 mm

Adjustable strap: approx. 25 - 50 cm

http://www.monde-tech.com/product_info.php?products_id=3338