... channel. Latency less than 0.5msFeatures and Advantage: 1.wireless tour guide system, audio guide system,teacher wireless microphone2. UHF ... hours at least.8. Application:Conference, Meeting, education, tour guide and factory etc.9. Packing details: One storage suitcase ... 3. Shipping port: Shenzhen of China. Or any seaport which customers offer. OEM ! Professional sets UHF tour guide wireless system