Dun Yu Tech specialize in manufacturing safe pet products.With over 20 years experience in N/B and PC thermal module assembly fields, Dun Yu Tech developed a series of pet products : Beetle -chew resistant USB cableBeetle -chew resistant RJ45 cableBeetle -chew resistant extension cordBeetle -season pet pad (heated/cooling pet pad)Beetle -Supercool cooling pet pad Beetle -cooling pet pad