Shanghai Tong Lee Teaching Instrument Factory specializes in producing L Responder T standard word, music playback system, a bell devices, bells, speakers, amplifiers and other teaching equipment on campus: 
 Tl-803 series of small quiz Responder equipment: (Unit: RMB) 
 Model Specification Group 6 Group 8 Group 10 Group 18 Group 12 Group 20 Group 16 
 TL-803A 850 880 920 980 1000 1050 1100 
 TL-803AT 1060 1160 1270 1380 1560 1650 1800 
 TL-803B 1330 1360 1400 1460 1480 1530 1580 
 TL-803BT 1540 1640 1750 1880 2040 2160 2280 


 Quiz Responder price list: 
 Product Name Specification Price Group 
 Responder 803-type quasi-plate 880 6 groups 
 12 sets of 803 standard-type Responder plate 980 
 Type Responder Group 803 18 1100 standard plate 
 Responder group of large-screen standard plate 6 3380 
 City Hall sport for a large screen Responder group subtraction analysis revealed 12 4980 
 Responder large screen TV special group of eight inches of 12 time points show two-way control of 19,800 plus or minus points