Bluetooth module 4.0 Introduction: Support bluetooth v4.0 low energy (ble 4.0) wireless standards. Support slave and master mode operation. Super low energy mode: 13.6ma rx current at 3v, 13.3ma tx current @0dbm at 3v. Support multiple network protocols. Support smart configure for network. Support program’s remote upgrading. Optional antenna: internal or external. Support uart, pwm, gpio, ad and other interfaces. Micro sizes: 12mm x 20mm x 3.5mm, smt. Power supply: battery or 3.3v single supply. Fcc certification. Comply with rohs standard. Access cloud platform for free. Application: Handheld devices Personal medical Internet of things Wireless sensor & industrial control Light control