Best Sleep Monitor WristbandSmart Sleep Monitor report graphs showing the times when you were in light sleep and deep sleep based on motion. The Basis Peak goes one step further,Website:://.goswalle.com, using your heart rate and skin temperature to help it detect when you're in a top cycle. You will love Swalle Fitness trackers for sleep monitoring.Scientists have been mapping our sleep patterns for years and agree that good diet, low stress and plenty of exercise can help us sleep better. Impossibly small and light, it can be worn on your wrist, as a pendant or clipped onto your pyjamas and most importantly you won't notice it's there, and with no bulky edges you'll not roll onto it or catch your partner with it.Technical parameters of Sleep Monitor Wristband1>Adopt 0.91 inch 128X32 OLED display screen2> Battery capacity: 120MAH3> 5V DC charging with common MICRO USB socket4> Product weight: 120g (wrist strap headphones)5>Support all Android phones, Apple, Nokia, HTC, Samsung (not limited by the mobile platform)6> Bluetooth version: Version 4.1  HFP HSP A2DP AVRCP 7> Wrist strap: TPU    Wrist strap bearing: PC ABS   Headphones: PC ABS8> Standby time: 72HMain Function of Smart Bracelet:Our Certification:Order Process:Payment and shipment:Company