- For LD Systems E500 systems - Characteristic: Cardioid - Audio frequency range: 60 - 16,000 Hz - Switchable transmission power: 2 mW, 10 mW and 30 mW - OLED display - Pilot tone - Operation with 2 1.5V AA batteries or rechargeable batteries - Frequency range: 655 - 679 MHz - Dimensions: 257 x 50 mm EUR 188.00 - See more - Buy online