Arlo Pro is a wire-free indoor and outdoor security camera with rechargeable batteries and audio and can be added to any Arlo base station system. Arlo Pro includes rechargeable batteries, motion, and sound-activated alerts, 2-way audio. A 100+ decibel siren and 7 days of free cloud HD video recordings. Arlo covers every angle to help keep you safe and protected. Arlo has a 130° viewing Angle.