Wireless Whisper Tourist Guide System 2.4G for group training and tourism, church translation service, and voice guide

Wireless Tour Guide System 2.4G for group training and tourism and church visits and voice translation. Guide specifications: 1. Frequency range: 2.4G 2. Frequency response: 100Hz ~ 20kHz 3. Number of channels: 9999 channels 4. Frequency mode: FM manual 5. Charging voltage: DC5.0V 6. Working current: 140 ± 5 milliamps 7. Signal-to-noise ratio: -67dB 8. Sensitivity: 50mVrms 9. Distortion: <0.5%@1kHz 10. Battery life: approximately 20 hours 11. Charging time: approximately 3.5-4 hours 12. Size: 115*55*26 millimeters 13. Weight: 100 grams 14. Working distance: approximately 200 meters 15. Battery type: Lithium polymer battery 16. Materials: ABS. Receiver specifications: 1. Frequency range: 2404-2478 MHz 2. Frequency response: 100Hz ~ 20kHz 3. Number of channels: 9999 channels 4. Frequency mode: FM manual 5. Charging voltage: DC5.0V 6. Working current: 19±5 milliamps 7. Signal-to-noise ratio: >50 decibels 8. Sensitivity: -97dBm 9. Distortion: <0.5% at 1kHz 10. Battery life: approximately 15 hours 11. Charging time: approximately 2.5-3 hours 12. Size: 56*23*10.5 millimeters 13. Weight: 17.5 grams 14. Working distance: approximately 200 meters 15. Battery type: Lithium polymer battery. This webpage contains product performance data, which is measured in a laboratory environment. Actual values may vary depending on product usage time and environment.