Shure Axient Digital Handheld Microphone Transmitter ADX2FD/K8

Durable, moisture-resistant, lightweight metal case in black and nickel finish
Up to 9 hours of runtime with SB920A rechargeable battery
External contacts for docked charging with optional fully covered radome
Diversity ShowLink enabled for remote transmitter control and automatic interference avoidance
Two transmission modes: Standard for optimal coverage and new High Density for maximum system channel count and robust coverage
Encryption-enabled, secure transmission