Garmin Ltd. on Wednesday launched an arm band for wear during sleep that can track vital health metrics, stepping up competition with companies like Whoop Inc. and other emerging players.

Garmin released today its new Index Sleep Monitor, a smart sleep band that gives users a closer look at their overnight vitals and recovery. In addition to tracking sleep duration and stages, the Index Sleep Monitor provides users with their overall sleep score,

Sleep tracking is nothing new in Garmin’s fitness watches, but the company’s latest wearable is a dedicated smart sleep band. The Index Sleep Monitor offers week-long battery life with continuous pulse ox tracking for monitoring your blood oxygen saturation while you sleep.