Specification: Item Type: Wireless Monitor System_x000D_Material: ABS_x000D_Model: EM D04_x000D_Scope of Application: Suitable for Professional Places Such As Stage Performances_x000D_Bodypack Receiver Built in Battery: 8 x AA Dry Battery (Not Included)_x000D_Plug Specifications: EU Plug (100-240V)_x000D_Host Transmitter:_x000D_Frequency Range: 600-690MHZ_x000D_Transmission Method: FM, Mono_x000D_Number of Channels: 16_x000D_RF Output Power: 50mW_x000D_Frequency Response: 60Hz-17KHz3dB_x000D_Bodypack Receiver:_x000D_Frequency Range: 600-690MHZ_x000D_Number of Channels: 16_x000D_Transmission Method: FM, Mono_x000D_Receiving Method: Diversity_x000D_Acceptance Sensitivity: -100dBm (Sinad30dB)_x000D_Wireless Range: Approx. 200m/656.1ft Features: 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. PackageList: 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