Feature:1. [Ease of Use] The monitoring system features simple controls, selectable sound frequencies to optimize your sound, allows volume to be set at safe levels, blocks unwanted stage noise.2. [Stable Performance] Ear monitor system features UHF wide sound signal transmission in the 600 to 690 MHz frequency range, which works flawlessly in both studio and stage environments without distortion.3. [Wireless] Monitor and receiver system provides desktop stage monitoring with wireless range up to 200 meters, kit includes sound system transmitter, digital bodypack receiver and earbuds.4. [Professional] Four channel ear monitoring is designed for professional sound effects, durable and stable monitoring system, real time monitoring of background music, singers singing without pressure.5. [Multi Application] Professional stage monitoring system, purer sound and enhanced performance, providing consistent sound performance, suitable for recording monitoring, music monitoring, etc.Specification:Item Type: Wireless Monitor SystemMaterial: ABSModel: EM D04Scope of Application: Suitable for Professional Places Such As Stage PerformancesBodypack Receiver Built in Battery: 8 x AA Dry Battery (Not Included)Host Transmitter:Frequency Range: 600-690MHZTransmission Method: FM, MonoNumber of Channels: 16RF Output Power: 50mWFrequency Response: 60Hz-17KHz3dBBodypack Receiver:Frequency Range: 600-690MHZNumber of Channels: 16Transmission Method: FM, MonoReceiving Method: DiversityAcceptance Sensitivity: -100dBm (Sinad30dB)Wireless Range: Approx. 200m/656.1ft.Package List:1 x Monitor Host4 x Bodypack Receiver1 x Power Adapter4 x 6.5mm Wire4 x Earbuds2 x Antenna1 x Manual