SLX-D+ Digital 1-Channel Wireless Microphone System, includes 1 SLXD4+ Receiver with Bluetooth remote monitoring and control, AES-256 encryption, Digital Feedback Reduction, networkable, controllable via WWB and Mobile APP, 1 SLXD1+ Bodypack Transmitter with SM35 Electret Condenser Headset Microphone (cardioid), rack mount kit, 2 AA batteries, 2 1/4 wave antennas, 2 bulkhead adapters, 2 22" BNC cables, 1 carrying bag, frequency band G57 (470-608 MHz, tuning range 138 MHz)