Shanghai Tong Lee specialized in producing a bell device, music broadcasting system, competition Responder and other products: 
 When a bell computer controlled device: 
 Specifications Product Name Model Price 
 KZ - 888 A special-purpose control apparatus 300 
 KZ - 888 B-type-specific control of a bell 290 
 KZ - 888 C-type all the way to the Ring, four controlling electrical 680 
 KZ - 888 D-type all the way to ring a bell, all the way to control the electrical 415 
 KZ - 888 E-type all the way to ring a bell, seven road control electrical 760 
 KZ - 888 F-type AC-DC co-existence 340 
 Wall calendar every day to play with different bell schedules program automatically convert 650 yuan 
 AC DC bell ringing specifically with F-100 Used