SAMSUNG WATCH 9 L340 GRAPHITE BT (40MM)

Looking for a compact smartwatch for your Samsung or Android phone? The Samsung Galaxy Watch9 40mm Bluetooth Graphite (SM-L340) is Samsung's 2026 smartwatch for people who want accurate health tracking, a bright display and a lightweight case you barely notice on your wrist. The 40mm size is ideal for smaller wrists, women and anyone who prefers a discreet, elegant watch.

Key benefits at a glance

• 1.3" Super AMOLED up to 3000 nits — perfectly readable in bright sunlight.
• Sapphire crystal glass and MIL-STD-810H — scratch and impact resistant.
• Snapdragon Wear Elite (3nm), 2GB RAM, 32GB storage.
• 390mAh battery — 20% larger than the Galaxy Watch8.
• ECG, blood pressure, SpO2, sleep apnea risk, Energy Score, Heart Health Score.
• Google Gemini with Raise to Talk — just lift your wrist and speak.
• Bluetooth 6.0, Wi-Fi, NFC, dual-frequency GPS (L1+L5), 5ATM + IP68.

Display and design

The 1.3-inch (34mm) Super AMOLED display with 438 × 438 resolution and up to 3000 nits stays crisp indoors and on a midday run. It is covered by sapphire crystal, one of the most scratch-resistant materials used in watches. The aluminium case is just 8.6mm thick and weighs only 31.5g (without strap), so it's comfortable all day and night — even while you sleep. The included Sport Band with Air Pocket design is soft and light, and swaps easily with other Samsung bands. The Graphite finish works equally well for sport and the office.

Health tracking with the BioActive sensor

Samsung's BioActive sensor combines an optical heart rate sensor, an electrical heart sensor and bioelectrical impedance analysis (BIA). The watch can:

• record an ECG and measure blood pressure (after calibration with a standard cuff);
• track heart rate, heart rate variability (HRV), respiratory rate, skin temperature and blood oxygen (SpO2) in Vitals;
• estimate body composition (muscle, fat, water);
• detect sleep apnea risk (FDA-cleared), analyse sleep stages and offer Sleep Coaching;
• calculate an Energy Score — a daily readiness rating based on sleep and activity — plus a Heart Health Score. Note: the watch is not a medical device and is not intended to diagnose conditions.

Sport and training

The Galaxy Watch9 tracks a wide range of workouts and measures VO2 max, Fitness Index and Daily Cardio Load, while Running Coach builds a personal running plan. New Sweat Loss analysis provides real-time hydration guidance. Dual-frequency GPS (L1+L5) with GLONASS, Galileo, BeiDou and QZSS records routes more accurately even among tall buildings, and the barometer tracks altitude. It is water resistant to 5ATM (suitable for pool and open-water swimming) and dust-tight (IP68).

Performance, software and Gemini

The new Qualcomm Snapdragon Wear Elite, built on a 3nm process (five cores, up to 2.1GHz), with 2GB RAM and 32GB storage keeps apps quick and leaves room for music. The watch runs Wear OS 7 / One UI 9 Watch, and you can summon Google Gemini just by raising your wrist (Raise to Talk) — set a reminder, send a message or ask how close you are to your goal. Samsung guarantees security updates until 31 July 2031.

Battery and charging

The 390mAh battery is 20% larger than the Galaxy Watch8 40mm. With typical use it lasts all day and night, and longer with Always On Display off and moderate workouts. It charges wirelessly (up to 10W); independent testing shows a full charge takes about 1.5 hours.

Connectivity and compatibility

Bluetooth 6.0, dual-band Wi-Fi (2.4/5GHz) and NFC for contactless payments (Google Wallet / Samsung Wallet). This SM-L340 is the Bluetooth version (no LTE) — calls and notifications come through your paired phone. Compatible with Android 13 or later phones with at least 1.5GB RAM; all features (e.g. ECG, blood pressure) work with Samsung Galaxy phones. Not compatible with iPhone.

Frequently asked questions (FAQ)

Is the Galaxy Watch9 40mm good for small wrists? Yes, the 40mm case (42.7 × 40.4 × 8.6mm, 31.5g) is the smallest in the Watch9 line and fits smaller wrists well. Can I pay with the watch? Yes, it has NFC and supports contactless payments. Can I swim with it? Yes, 5ATM and IP68 — suitable for swimming, not diving. Does it work with iPhone? No, it needs an Android 13 or later phone. What's the difference between BT and LTE? The BT model (SM-L340) works through your phone; the LTE model has an eSIM and can make calls without a phone.

Who is it for? The Galaxy Watch9 40mm in Graphite is ideal for Samsung Galaxy phone owners, active people and runners, anyone who cares about heart health and sleep, and those looking for a stylish, lightweight smartwatch with a bright display. It also makes a great gift for him or her.

Keywords: Samsung Galaxy Watch9, Galaxy Watch 9 40mm, SM-L340, Galaxy Watch9 Graphite, smartwatch, Samsung watch, smartwatch with ECG, blood pressure monitoring, sleep apnea, sapphire glass, Wear OS, Gemini, NFC watch, GPS watch, women's smartwatch, Android smartwatch.

Technical Specification