ITEM NAME:2 x Interface Base Serial Board Transceiver Bluetooth Module HC-05 Best New Descriptio n Description: 100% brand new and high quality Power anti-reverse, reverse power does not work Input voltage 3.6 ~ 6V, prohibiting more than 7V Common various models can install bluetooth module, such as HC05, HC06, HC07, BC04, or other compatible bluetooth module pin definition This product has no bluetooth function, only a board Specifications: Material: Components+PCB board Color: As the picture shows Power: DC 3.6-6V Whole size: 0.63*1.73inch/1.6*4.4cm Package Included: 2x Bluetooth Base Board Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. Whatever the ending's perfect or not, you can't disappear from my world 2 x Interface Base Serial Board Transceiver Bluetooth Module HC-05 Best New.Common various models can install bluetooth module, such as HC05, HC06, HC07, BC04, or other compatible bluetooth module pin definition. This product has no bluetooth function, only a board. 2x Bluetooth Base Board.