1.2400MHz-2483MHz is an ISM frequency band which is legal and free all over the world. 120 selectable frequencies can support more than 100 rooms using at the same time without crosstalk. 

2. Humanized Multi-room simultaneous using solution: 1-3 meters paring distance, more than 10 meters using distance. Each microphone can use in any room installed with TP-WIRELESS speaker without crosstalk. Every teacher can have their personel microphone and use it in any classroom. 

3. The transmit frequency is automatically and synchronously set by the receiver (main speaker). 

4. Choices of installation: mounting with tripod, hanging on wall, or putting on the table directly. We provide the mounted plates as the installation accessories, you can also complete the installation work according to the instructions. 

Features of the speaker: 
1. High quality wooden speaker housing and advanced audio circuitry design features natural and distortion-free sound. 
2. Stereo left and right speakers, maximum output power is up to 60W. 
3. Broadcasting Audio Input socket for convenient connection with signal from campus broadcasting or DVD, etc. 
4. RCA audio Input function meets the demands of multimedia teaching. 
5. Fuse Socket makes the equipment is safe enough for any application. 

Features of the wireless microphone: 

1. The microphone supports hold by hand, neck-hanging. 
2. A lanyard is included, it is convenient for teacher to hang on neck with hand-free. Especially suitable for female teacher wear suit without pocket and belt. 
3. It is powered by a rechargeable Lithium Battery. (the continuous playtime is up to 12 hrs) 
4. Mute function automatically when no signal and week signal. 
5. Small in size and light in weight, easy to carry.  

Technical Parameters: 
Frequency Range: 2400MHz-2483MHz 
Frequency Response: 20Hz-20KHz 
Playtime of Transmitter): >8hrs 
Guatantee Operating Range: 15meters 
Power Supply: AC100V-AC240V 
Output Impedance: 4Ω 
Latency Time: 1.1-2ms 
SNR: 89dB 
Distortion: 1.5%@1KHz 
Output Power: 60W(2*30W) 
Dimensions: 495mm*345mm*275mm 
Weight: 9.68Kg