Product Description:
1. Please charge for more than 5 hours before first use.
2. Change the frequency of the sound every 5-8 days to get the desired effect.
3. The control is not suitable for noisy environments, so it is not ideal for more than 2 dogs.
4. Not suitable for dogs under 6 months and over 8 years of hearing disorder
5. The device can not provide protection against aggressive dogs