1. For audio equipment:
a. Non-contact volume control.
b. Modulation circuit.
c. Auto-return systme or turntable.
2. For melody toys: melody greeting card, melody tea cup and coffee cup melody candle,etc.
1. Epoxy encapsulated.
2. Four type CdS to choose.
3. Operating temperature: -25 degrdd C~+75degree C.