Provides freedom of movement for video production, computer applications and business presentations Two switchable frequencies for interference-free operation High-band VHF operation for superior sound Normal operating range 100' up to 300' under optimum conditions Durable, flexible antenna can be positioned for best reception Real-time monitoring capability with included earphone Rugged design and construction with handsome non-reflective finish Quick and reliable mounting system for camcorder use Receiver and transmitter are each powered by a single 9V battery PRO 88W Specifications: Operating Frequencies (169.505 MHz & 170.305 MHz) T57 (171.045 MHz & 171.845 MHz) T68 (171.105 MHz & 171.905 MHz) TVHF (179.400 MHz & 180.600 MHz) PRO 88W-R35 T24 (169.505 MHz & 170.305 MHz) Receiver Reception System FM Superheterodyne Reception Sensitivity 2 µV for 30 dB S/N DC Input 9V DC (center-positive) Battery 9V alkaline (not included) Current Consumption 50 mA Battery Life 8 hours nominal Dimensions 4.09" (104.0 mm) H x 2.44" (62.0 mm) W x 0.94" (24.0 mm) D Net Weight (without battery) 3.5 oz (100 grams) Transmitter Modulation Frequency Modulation Modulation Sensitivity 6 mV input for full deviation Battery 9V alkaline (not included) Current Consumption 50 mA Battery Life 8 hours nominal Dimensions 4.09" (104.0 mm) H x 2.44" (62.0 mm) W x 0.94" (24.0 mm) D Net Weight (without battery)