Kensington lock terminal to prevent theft. AC adaptor powered. MAC OS X 10.6 or later, Windows XP/Vista/Win7/Win8 Compatible. Optional 19" rackmount accessory (RM6000) available. Optional Nylon Flight Case (FB3000) available. Size: 18.1" (w) x 2.0" (h) 10.0" (d) without rack ears. 19.0" (w) 6U (d) rack mounting size. Weight: Product Weight: 9.2 lbs. Package Weight: 12.7 lbs. What's in the Box: (1) SR45 Receiver. (1) HT45 Handheld transmitter. (1) Stand adapter. (1) Universal power supply with US. Feature: Carrier frequency range: 500 600 MHz. Modulation: FM (Frequency Modulation). T.H.D. at 1 kHz: typ. 0.8%. Signal/noise ratio: typ. 105 dB(A) Denon DJ MC6000MK2 | Professional Digital Mixer & Controller The Perception Wireless high-performance Vocal Set delivers brilliant sound and is surprisingly easy to use. The included HT45 handheld transmitter features a dynamic microphone with the cardioid polar pattern, ensuring voices to cut through any mix. The SR45 receiver provides professional XLR and 1/4" jack outputs.