1High efficiency.DC-DC converter 85-90%, LDO 71-78%, overall efficiency 60-70%. 2Over temperature shutdown, undervoltage protection, BS voltage protection and short circuit protection. 3Suitable for Smart Home/Home Automation, Distributed Power System, Preregulator for Linear Regulators, FM Radio, Battery-Powered Devices, Handheld Electronics, Audio Amplifiers. 4The wireless module is Nrf24l01 CC1101 CC2500 CC2530. 5The maximum output current is 700mA,and the short time maximum output current is 1000mA.