The Firstbeat Sports Sensor is a lightweight, water (to 30m/100ft) and shockproof sensor which connects to a textile strap worn by athletes. It is used to collect player data on training load and recovery in real-time and for post-analysis and is compatible with the Firstbeat Sports app*. Key benefits: Embedded processor means continuous load calculation regardless of range Removes the need for receiver or sideline laptop during practices Collect data from player groups in different locations (e.g. gym rehab and main group training) Global compatibility Connects with Firstbeat Sports app for effortless and automized data uploading Technical specifications: Battery duration: 160 hours (CR2025, self-replaceable) Transmission protocol: Bluetooth Smart (4.2) Material: plastic (sensor), textile (strap) Heart rate data: Beat-to-beat (RR-i) Each Firstbeat Sports Sensor comes with one (1) sensor protector and one (1) textile strap. Replacement straps can be purchased here. *Coach access to Firstbeat Sports app available on iOS devices. Athlete access available on iOS and Android devices. More info about Firstbeat Sports here.