The SPO Pulse Oximeter can be used in motion. The wrist oximeter is nail polish tolerant, no matter how dark the polish is. It is compatible with commercially available software used in sleep apnea applications. This fingertip pulse oximeter has a strong and attractive design and is easy and practical to use. Its battery allows it to be used for over 300 hours total and an indicator on the device lets user know the status of the battery strength.