The August Smart Lock provides intelligent, secure access to your home. Now you can control who can enter and who can’t—without the need for keys or codes. And you can do it all from your smartphone. August Smart Lock’s encrypted technology is safer than keys that can get lost or codes that can be copied. You can still carry a key. You just don’t have to. August Smart Lock is powered by four AA batteries so it’s always on – even if the power, Wi-Fi, or cable go down.