Feature:1. STABLE AND RELIABLE: Adopting UHF frequency band, PLL frequency synthesis technology, in a non interference and open environment, the transmission distance is about 300 meters, the signal is stable and reliable.2. SUPPORT BLUETOOTH: Wireless monitoring system supports electronic products with Bluetooth function, allowing you to experience the pleasure of wireless music.3. SUPPORT MULTIPLE HEADPHONES: Wireless ear monitoring system adopts digital parallel wireless technology, support N+ wireless headphones real time interconnection.4. ADJUSTABLE VOLUME: Wireless stereo monitoring system with adjustable volume function, flexible and convenient, to meet the different needs of use.5. STEREO DESIGN: Wireless IEM system has stereo transmitter and stereo receiver, stereo means you can hear the fullest and most accurate monitoring sound.Specification:Item Type: Wireless Monitoring SystemMaterial: Aluminum AlloyFrequency Range: 530580MhzFrequency Response: 30Hz to 20KHzReceiver Battery: 2 x 1.5V AA Batteries (not Included)Using Distance: 50 Meters Indoor, More Than 100 Meters OutdoorVoltage: 100240V.Package List:1 x Monitoring System Equipment2 x Sound Cable1 x Instruction Manual1 x Receiver1 x Power Cord1 x Headphones1 x Signal Stick2 x Bracket