Live a stronger, smarter life with Galaxy Watch at your wrist. Rest well, stay active and keep stress at bay with built-in health tracking. Go for days without charging your watch. —the Bluetooth connection keeps everything at your wrist. Compatible with select Bluetooth-capable smartphones. Galaxy Watch supported features may vary by carrier and compatible device. For best results, connect with compatible Samsung Galaxy smartphones.) Battery life for Bluetooth (46mm) model is roughly three to four days. Battery life for LTE model and Bluetooth (42mm) model is roughly two to three days. Your results may vary. Case Material- Stainless Steel.