Garmin Forerunner 255 3.3 cm (1.3) MIP 46 mm Digital 260 x 260 pixels Grey Wi-Fi GPS (satellite)

Flash memory: 4 GB | Display resolution: 260 x 260 pixels | Warnings: The battery in the watch should not be replaced by unauthorised persons. If the battery runs out, contact an authorised service centre. | Weight: 49 g | Thickness: 1.29 cm | Bluetooth: Yes | Display diagonal: 3.3 cm (1.3") | Width: 45.6 mm | Warnings: Avoid prolonged contact with water to prevent damage to the device. | Warnings: Do not expose the product to extreme temperatures or direct sunlight. | Built-in microphone: No | Watch case material: Carbon Fibre Reinforced Polymer (CFRP) | Always-on display: Yes | Market positioning: Sport watch | Standby time (Bluetooth off): 25 h | Heart rate-based calorie computation: Yes | Advanced workouts: Yes | Headphone connectivity: Bluetooth | Watch case colour: Grey | Touchscreen: No | Heart rate data transfer: Bluetooth/ANT+ | Battery life: 14 day(s) | Virtual partner function: Yes | Accelerometer: Yes | Band colour: Grey | Barometer: Yes | Barometric altimeter: Yes | Alarm clock: Yes | Blood oxygen sensor: Yes | Distance travelled: Yes | SMS notifications: Yes | Water resistance: 5 ATM | Band material: Silicone | Waterproof: Yes | Activity tracker: Yes | Time/distance alert: No | Closure type: Single prong strap buckle | Electronic compass: Yes | Depth: 45.6 mm | Recommended activity: Climbing | Calendar notifications: Yes | Battery life (max): 30 h | Weather forecast: Yes | Heart rate monitor: Yes | Activity monitoring: Yes | Personal goals: Yes | Gyroscope: Yes | Galileo: Yes | FM radio: No | Built-in speaker(s): Yes | Clock mode: 12h/24h | GPS (satellite): Yes | Buckle colour: Black | Watch case size: 46 mm | Display technology: MIP | Removable strap: Yes | Automatic daily activity detection: Yes | Watch glass type: Corning Gorilla Glass 3 | Multisport mode: Yes | Display type: Digital | Stopwatch: Yes | Heart rate measuring: Automatic | Shape: Round | Lens material: Glass | Display diameter: 3.3 cm | Band size: One Size | Wi-Fi: Yes | Music player: Yes | Calories burned: Yes | Heart rate sensor type: Optical | Calendar: Yes | Pedometer: Yes | Interval training: Yes | Near Field Communication (NFC): Yes | Colour display: Yes | ANT+ enabled: Yes | Weather display: Yes | Mobile network connection: No | Heart rate contact sensors: Yes | Timer: Yes | Thermometer: Yes | Protection features: Water resistant, Waterproof | USB port: No | Call notifications: Yes | Audible alarm(s): Yes | Recommended activity: Cycling | Smart notifications: Yes | Battery life (GPS mode): 16 h | Built-in camera: No | Recommended activity: Fitness | Recommended activity: Running | Wrist size range: 130 - 205 mm | GLONASS: Yes | Recommended activity: Diving | Recommended activity: Swimming | Recommended activity: Golf | Music control: Yes | Quality of sleep: Yes