Sennheiser EW IEM G4 Twin A1 Wireless Monitor System Engineered for professional live sound: Rugged all-in-one wireless monitoring system for in-ear applications. Full control over your performance ? your direct link, everywhere, everyday. The G4 In-Ear Monitoring Sets make your gig an extraordinary experience ? not just for your audience, but also for you. Robust bodypack receiver and reliable in-ear monitoring IE 4 headphones delivering clarity along the whole frequency spectrum for daily use on stage. Features 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 Specsification Dimensions: Approx. 202 x 212 x 43 mm Weight (g): Approx. 980 g Audio input: 2x XLR-3/OE" (6.3 mm) jack combo socket, electronically balanced Audio output: OE" (6.3 mm) stereo jack socket, balanced Signal-to-noise ratio: 90 dB Connection: Wireless Receiver principle: Adaptive diversity RF sensitivity: 4 ?V, typ. 1.6 ?V for 52 dBA rms S/N Total harmonic distortion (THD): 0.9% Audio frequency response (Hz): 25 Hz to 15 kHz Audio frequency response: 25 Hz to 15 kHz Signal-to-noise ratio: 90 dB Squelch: 5 to 25 dB?V, adjustable in steps of 2 dB Connection: Wireless Audio Input: 2x XLR-3/* (6.3 mm) Jack combo socket, electronically balanced Audio output: 0.25 (6.3 mm) stereo jack socket, balanced Antenna output: BNC socket, 50 Ohms Battery capacity (Ah): 2.3 Battery count: 4 Battery Included: Y Battery voltage (V): 1.5 Battery operating time (h): approx. 4 to 6 hours (depending on volume level) Dimensions: Approx. 202 x 212 x 43 mm Height (mm): 73 Length (mm): 405 Weight (g): Approx. 980 g Width (mm): 350 Product height: 73 Product length: 405 Product weight (g): 980 Product width: 350