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

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