I've been using this for about a year, but I'm selling it because I no longer need it. It's a size L, 38W model. Operation has been confirmed. EXO TERRA's REPTILE HEAT, which thoroughly warms the bottom of the cage. Maximum temperature is approximately 45°C. - Brand: EXO TERRA - Product Name: REPTILE HEAT - Maximum Temperature: Approximately 45°C - Size: L size - Features: Thoroughly warms the bottom of the cage Thank you for looking.