Wireless travel guide system replaces office conference receiver accessories description : [Multi Channel]: The wireless conductor system has 35 channels, frequency adjustment, the use of international 2.4G general channels, strong compatibility, 35 frequency bands can be switched freely. [Wide Application]: The tourist guide wireless voice transmission system is an original high speed audio transmission, meeting the explanations of tourist guides, corporate reception, wireless conferences, wireless teaching and large multiplayer scene. [Display]: Wireless guide to voice audio transmission system, wide-angle OLED display, clearly display channels, signals, power, volume information, etc. [distance]: Wireless Explainer has super distance in the absence of obstacles, connection distance can reach 100-150 meters. [Design]: wireless tourist guide system uses digital signals, sound transmission is stable, and confidentiality is high. Make every communication look closed. Specification: Operating temperature: C125C Connection distance: 100 150 m barrier free distance Number of Channels: 35 Frequency: Battery capacity: 1000 mAh Charging Interface: DC5V 1A( ) Product Color: White Material: display Size Chart: : 13 cm x 5 cm x 2,5 cm/5,12 inch x 1,97 inch x 0,98 inch Receivers: 8,1 cm x 4,5 cm x 1,9 cm/3,19 inch x 1,77 inch x 0,75 inch The package includes: How you choose: 1 1 microphone 1 leash 1 charging cable 1 Chinese and English textbook Or 1 receiver 1 headset 1 leash 1 charging cable 1 Chinese and English textbook