Features: High efficiency.DC-DC converter 85-90%, LDO 71-78%, overall efficiency 60-70%. Over temperature shutdown, undervoltage protection, BS voltage protection and short circuit protection. Suitable for Smart Home/Home Automation, Distributed Power System, Preregulator for Linear Regulators, FM Radio, Battery-Powered Devices, Handheld Electronics, Audio Amplifiers. The wireless module is Nrf24l01 CC1101 CC2500 CC2530. The maximum output current is 700mA,and the short time maximum output current is 1000mA. Specification: Type(Optional):With Pin/Without Pin 3.3V: Input Voltage 6-40V, Output 3.3V DC-DC Converter 6V to 4.6V, LDO Regulator to 4.6V to 3.3V. 5V: Input Voltage 8-40V, Output 5V DC-DC Converter 8-40V to 6.4V, LDO Regulator 6.4V to 5V. Maximum Output Current 700mA, Short-Term Maximum Output Current 1000mA Working Frequency:550KHz Efficiency:DC-DC Converter 85-90%, LDO 71-78%, Overall Efficiency 60-70% Quiescent Current: About 1.5mA Function:Over Temperature Shutdown, Undervoltage Protection, BS Voltage Protection And Short Circuit Protection. Size:25 X 16 X 5.8mm / 0.98 X 0.63 X 0.23in Weight: 4g/0.14oz DC-DC Converter :High Efficiency, High Ripple LDO Regulator : Low Efficiency, Low Ripple DD38LOSA 2 In 1 Converter : High Efficiency,Low Ripple Applications: MCU ARM CPU FPGA/CPLD 12V 9V 6V TO 5V 3.3V lithium battery-powered systems esp8266 HC-12 SPP-C WIFI Bluetooth Module PTC CCTV IP Camera Wireless Module:Nrf24l01 CC1101 CC2500 CC2530 Smart home / home automation Distributed Power Systems Pre-Regulator for Linear Regulators FM radio Battery powered equipment Handheld electronic device Audio amplifier Package List: 1 x Converter Note: 1. The input voltage cannot be greater than the maximum input range. 2. The output power cannot be greater than the maximum load for a long time. 3. The input power must be greater than the power output because of the power consumption of the module itself.