1. RW2090 come with UHF band Phase lock Pll, Statics free and delay free, Among the band of 32MHz, the preset 2 x 100 frequencies can be arbitrary switching. 2. Built-in Limiter circuitry eliminating distortion under excessive input levels. Front panel 1/4 inch stereo monitoring has the headphone jack. Used in stage, it can replace traditional complies sound monitoring.3. More features in Iem monitoring: The wireless transmitter and receiver can pairing automatically. USB dish connection, Bluetooth connection function, Mute function, support play the performance accompaniment. The Iem system works perfectly in various sound-monitoring events, stage performance, studio recording, exhibit, lecture, instruction, speech, etc.4. RW2090 offers tabletop stage monitoring and enables users to move freely on the stage and in the studio with a coverage of 230ft(70m). The frequency rang is 550.1MHz-599.95Mhz. LCD panel provide system details, including channel, group number and RF indicator.5. Auto pairing: The wireless transmitter and receiver can pairing automatically, no need to manually tune the channel.6. Packing include: Transmitter x1, Bodypack Receiver x2, Antenna x2, Earphone x2, Cable Line x4, Power Adapter x1, User Manual x1.7. Receiver power supply: 2 x AA batteries (not included)Specification: Package Weight One Package Weight 2.90kgs / 6.40lb One Package Size 55cm * 38cm * 8.5cm / 21.65inch * 14.96inch * 3.35inch Qty per Carton 5 Carton Weight 15.50kgs / 34.17lb Carton Size 55cm * 38cm * 45cm / 21.65inch * 14.96inch * 17.72inch Loading Container 20GP: 283 cartons * 5 pcs = 1415 pcs40HQ: 658 cartons * 5 pcs = 3290 pcs