Solu JY-MCU HC-06 Slave Bluetooth Serial Port Transeiver Baseboard Mini module// Arduino Wireless Bluetooth Transceiver Module Slave 4Pin Serial About us (Solu ), Professional factory of circuit boards, welcome to our store for more choices with best price. What we pursue is your satisfication of our service, not just for our goods.For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. we will reply you about any question you ask within 24 hours Core module HC-06, leads to interface includes VCC, GND, TXD, RXD, aside LED status output pin, Adapted to many USB Bluetooth Such as HC05 HC06, HC07, BC04 or other compatible Bluetooth module pin definition.Power reverse connect protection Usually, you will get it actually in 9~19 days, If you are in the USA and the item is NOT Fulfilled by Amazon. the item will be sent to you by USPS with shipping information from China. The estimated delivery time offered by Amazon is not the real time. Your patience is highly appreciated. Hope you will receive your item soon and enjoy using it. the input voltage 3.6 ~ 6V, unpaired when the current approximately 30mA, paired about 10mA, the input voltage must not exceed 7V