| key specs | 
| Strap Colour | Black | CreamGold, RoseGold, and MidnightOrchid | 
| Display Size | 35mm | - | 
| Compatible OS | Android and iOS | - | 
| Strap Material | Silicone | Silicone | 
| Dial Shape | Round | Round | 
| Display Type | AMOLED | - | 
| Ideal For | Unisex | Women | 
| general | 
| Brand | Garmin | Garmin | 
| Model | D2 Air X15 | Lily Sport | 
| Release date | October 22, 2025 | March 8, 2021 | 
| Model Name | Garmin D2 Air X15 | - | 
| Dial Shape | Round | Round | 
| Strap Colour | Black | CreamGold, RoseGold, and MidnightOrchid | 
| Strap Material | Silicone | Silicone | 
| Size | Regular | Regular | 
| Water Resistance Depth | 5 ATM | - | 
| Usage | Fitness & Outdoor | - | 
| Ideal For | Unisex | Women | 
| Water Resistant | - | 5ATM | 
| Dial Material | - | Anodized Aluminium | 
| Dial Colour | - | White, LightSand, and Deep Orchid | 
| dimensions | 
| Weight (g) | 38.00 | 24.00 | 
| Width | - | 34.50 | 
| Height | - | 34.50 | 
| Thickness | - | 10.15 | 
| product details | 
| Sensor | Heart Rate Monitor, Stress, Sleep,  Pulse Ox blood oxygen | Accelerometer, Ambient light sensor, Blood Oxygen Saturation Monitor | 
| Compatible Device | Android and iOS | - | 
| Notification | Call Notification, Smartphone Apps Notifications | incoming calls, text messages, social media updates | 
| Battery Life | 10 days | Up to 5 Days | 
| Closure | - | Classic Buckle | 
| connectivity features | 
| Call Function | Yes | No | 
| Bluetooth | Yes | Yes | 
| Third Party App Support | Yes | - | 
| Call Features | Make and Receive calls | - | 
| Other Connectivity Features | GPS, Galileo, Glonass, Beidou, QZSS | - | 
| platform and storage features | 
| Compatible Operating System | Android and iOS | - | 
| RAM | 8GB | - | 
| camera and display features | 
| Display Resolution | 454 x 454 | 240 x 201 | 
| Display Size | 35mm | - | 
| Display Type | AMOLED | - | 
| fitness and watch functions | 
| Step Count | Yes | Yes | 
| Calorie Count | Yes | Yes | 
| Heart Rate Monitor | Yes | Yes | 
| Altimeter | Yes | - | 
| Compass | Yes | - | 
| Calendar | Yes | Yes | 
| Alarm Clock | Yes | Yes | 
| Date & Time Display | Yes | Yes | 
| Language | English | English | 
| Other Watch Functions | - | Pregnancy Tracking, Menstrual Tracking |