Transmitter for Shearwater Perdix AI OC/CC dive computer. The Perdix AI is capable of connecting to either one or two transmitters giving the diver the option to monitor both tanks or dive sidemount. Transmitter SpecificationsBattery Type (user replaceable): 3V CR2 LithiumBattery Life: 300 HoursDepth Rating: 152m / 500ftWireless Mode: Low Frequency RF 38kHz