12.8毫米磁声换能器， 5V的，表面贴装，内置式驱动电路
12.8mm magnetic sound transducer, 5V, surface mount, built-in driving circuit
12.8毫米磁声换能器， 5V的，表面贴装，内置式驱动电路
12.8mm magnetic sound transducer, 5V, surface mount, built-in driving circuit
8.5毫米磁声换能器， 3.6V的，表面贴装
8.5mm magnetic sound transducer, 3.6V, surface mount
8.5毫米磁声换能器， 3.6V的，表面贴装
8.5mm magnetic sound transducer, 3.6V, surface mount
8.5毫米磁声换能器， 3.6V的，表面贴装
8.5mm magnetic sound transducer, 3.6V, surface mount
8.5毫米磁声换能器， 3.6V的，表面贴装
8.5mm magnetic sound transducer, 3.6V, surface mount
