Teswell [2-Pack] 27 CM Replacement USB Charger Charging Cable for Fitbit Charge HR Band Wristband Wireless Sports Activity Bracelet - Black 2 PCS extra replacements charging cable for Fitbit Charge HR wristband ONLY! Recommended charging method - powered by USB of PC, laptop, notebook for high efficiency and stability Built-in Voltage Regulator (PTC) which protects your Fitbit Charge HR from being damaged by overcurrent 2 Pack 27cm(0.59ft) charging cables in case for need; one for home, another for office or travel Certification: FCC, RoHS. Guaranteed quality from more than 1000 times repeated insertion-and-extraction test