*Dog Bark Control and Dog Training - Our anti-bark device provides a safe and effective solution for dog training and bark control.  *Convenient to Use Outdoor -  The control range of the deterrent is 10m. Plus IPX4 waterproof function, no worry to carry to the outdoor and hanging on the tree. *Portable Size & Rechargeable - The device fits perfectly in your hand. With a chargeable lithium battery, take 5hrs charging time can work for 30 days.  *Tips for you - The anti-bark device doesn't effective in dogs with hearing problems, and we don't recommend using this product on dogs under 6 months as it may disrupt the dog's development of hearing. Training is required to achieve highly effective and long-lasting use. Specification: Item Name: Anti-Barking Device Material: ABS, Silicone Color: White & Orange Power: 3.7V 1500mah  Lithium Battery Charging Time: 5hrs Using Time: 30 Days Size: 8.5 x 9 cm Weight: 110g Package Size: 8.7 x 7.5 x 9.7 cm Package Weight: 150g Package List: 1 x Anti-Barking Device 1 x Lanyard 1 x Charging Cable 1 x User Manual