Sennheiser EW IEM G4 Twin Wireless In-Ear Monitoring System (B: 626 – 668 MHz)

Engineered for professional live sound: Rugged all-in-one wireless monitoring system for in-ear applications.
Robust bodypack receiver and reliable in-ear monitoring IE 4 headphones delivering clarity along the whole frequency spectrum for daily use on stage
Half-rack stereo transmitter in a full-metal housing with OLED display for full control
Easy and flexible wireless synchronization between transmitter and receiver via infrared
Compatible with Sennheiser WSM control software for flexible frequency allocation
Up to 16 compatible channels
Up to 42 MHz bandwidth with 1680 selectable frequencies, fully tunable in a stable UHF range
Transmission Range: up to 100 meters / 300 feet
High RF output power (up to 50 mW) depending on country regulations