Caldwell E-Max Comms Ear Muffs Tan. Communicate with multiple users on the range listen to music and protect your hearing all at once with the Links. The Links are compatible with all Bluetooth hearing protection including our E-MAX PRO BT Links Power Cords E-MAX PRO BTs and E-MAX Shadows. Specifications for Caldwell E-Max Comms Ear Muffs: Manufacturer: Caldwell Color: Tan Quantity: 1 Pair Interface: Bluetooth Features of Caldwell E-Max Comms Ear Muffs Connects Via Bluetooth Allows Communication Between Multiple Users Ambidextrous Boom Microphone Works With Other Bluetooth Hearing Protection Via Comm Link Package Contents: Caldwell E-Max Comms Ear Muffs Caldwell 1136235: E-Max Comms Ear Muffs Tan