100% brand new and high quality Features: Made of high quality electronic components, it is solid, durable and high performance, long service life. JDY-23 transparent transmission module is based on the Bluetooth-compatible 5.0 protocol standard, which can realize data transmission between the module and mobile phone. It adopts imported original chip, which support users to modify the device through AT commands Name, baud rate and other instructions, very convenient and flexible. With the working frequency band is 2.4GHZ; the modulation method is GFSK; the maximum transmission power is 4db; and the maximum transmission distance is 60 meters. By default, no configuration is required to quickly use BLE Bluetooth-compatible for product applications. Bluetooth-compatible module only, other accessories demo in the picture is not included Specification: Material: Electronic Components Size: app.2 x 1.5cm/0.79 x 0.59in Color: Blue Quantity: 1 Pc Product Parameters: Model: JDY-23 Working frequency: 2.4G Transmitting power: 4db (maximum) Communication interface: UART Working voltage: 1.8V - 3.6V Working temperature: -40-80 /-40-176 Antenna: Built-in PCB antenna Receiving sensitivity: -97dbm Transmission distance: 60 meters Master-slave support: slave Bluetooth-compatible version: BLE 5.0 (compatible with BLE4.0, BLE4.2) Wake state current: 800uA (with broadcast) Light sleep current: