Sirus Quad B 823 - professional bodypack transmitter; compatible with Sirus Quad R 823 # 502806; Mini-XLR 3-pin (TQG) connector (compatible to the t.bone and AKG); synchronisation with receiver via Infra-Red; frequency band: 823-865 MHz; frequency range: 40 Hz - 18 kHz; THD: <0.5% @ 1kHz; transmitting power: < 30 mW (switchable); battery: 2x AA 1.5 V; battery life: 8 or 15 hours (per transmission power); Display: frequency and battery status; removable antenna (length 85 mm); Dimensions without antenna (HxWxD) 95 62 x 34 mm; Weight: 100 g; Colour: matt black