If you are not sure whether this product is suitable for you, you can leave a message and tell me your bicycle model first, and I will reply to you within 24 hours.Specification of EW-WU111 E-tube port: 2Bluetooth LE (Low Energy): compatible Weight 5g Must be used with BM-DN100 or BT-DN110 WU111 option Package include: Only the EW-WU111 x1 WU111+ sd50 400mm Package include:The EW-WU111 x1 EW-SD50 400mm x1
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