SPECIFICATIONS: The general number system Channels: 4 channels Carrier frequency: A: 504.50 MHz 514.60 MHz 521.90 MHz 538.70 MHz B: 553.70 MHz 577.10 MHz 586.70 MHz 593.20 MHz Stability: 0.006% Normal deviation: 22 kHz S / N ratio: 80dB Audio output: Balanced and unbalanced Power requirement: ca 16 V, 400mA Dimensions: 440 × 210 × 40mm Weight (weight): Approx.1.3kgs A mixture of 1/4 "and four individual XLR outputs Wireless microphone Cartridge: RF output: 8 hours Package list: 1 * UHF Wireless receiver 4 * microphones 4 * antennas 1 * power adapter 1 * Audio cable 1 * user manual in English