保證安全結帳

| name | SD-546C Luminous wireless bicycle code meter |
| Material | engineering plastic ABS electronic components |
| display | LCD screen |
| size | 4.6*4.6*1.9cm |
| weight | about 90g |
| power supply | 1*CR2032 button battery in the meter; 1* 12V 23a battery in transmitter |
| color | black |












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