100% SLENDALE SL Soft Tact Grey HiPER Copper Mirror R0 light stays on for 3 170000312 light stays on for 3 seconds): Green ＞60% Blue 30%–60% Yellow 10%–30% Red ＜10%Heart Rate Zone Indicator (flashes during exercise to show current zone): White Warm up Blue Fat burning zone Green Aerobic endurance Yellow Threshold zone Red Anaerobic enduranceSound Alerts (Buzzer): Supports heart rate alerts and status remindersAuto Sleep Condition: Automatically enters sleep mode after no heart rate data and no Bluetooth connection for a set durationMaintenance Instructions: Rinse with clean waterChest Strap Length: Medium (75–100 cm) Vuelta España (2011) & Giro Italia (2012) Loaded with the timeless style of the original Slendale the smaller scale Slendale SL is specifically designed for smaller faces