Wireless Monitor System 4 Channel Selectable Sound Frequency Ear Monitor Receiver for Studio Recording EU Plug 100‑240V                       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 System  Material: ABS  Model: EM D04  Scope of Application: Suitable for Professional Places Such As Stage Performances  Bodypack Receiver Built in Battery: 8 x AA Dry Battery (Not Included)  Plug Specifications: EU Plug (100-240V)  Host Transmitter:  Frequency Range: 600-937MHZ  Transmission Method: FM, Mono  Number of Channels: 16  RF Output Power: 50mW  Frequency Response: 60Hz-17KHz±3dB  Bodypack Receiver:  Frequency Range: 600-937MHZ  Number of Channels: 16  Transmission Method: FM, Mono  Receiving Method: Diversity  Acceptance Sensitivity: -100dBm (Sinad≥30dB)  Wireless Range: Approx. 200m/656.1ft                    Package List:     1 x Monitor Host    4 x Bodypack Receiver      1 x Power Adapter      4 x 6.5mm Wire      4 x Earbuds      2 x Antenna      1 x Manual