CrittEar™ Comm is in development and will provide both protection from loud noises and allows for in-ear communication from the canine’s handler using a UHF transmitter. For the dog in Law Enforcement, Military, or Search & Rescue. Made with medical grade silicone, this product suppresses loud noises while working or having fun. When inserted correctly, a thermal activated wire expands within the device to adjust to the specific size of your partner’s ear canal to help with retention.