This is Huawei TalkBand B5, a hybrid headset and fitness band for active callers who also wish to keep track of fitness:

Big Screen, Easy Interaction:

• Enjoy bright colors and clarity on TalkBand B5’s 1.13" AMOLED screen, even in glaring light
• Made of 2.5D glass, it is 2.4 times bigger than the last generation, smooth and easy to use

Free Hands with Headset:

• If a call comes in when your hands are tied, the HUAWEI TalkBand B5 headset makes taking the call easy
• With the powerful triple-core audio chipset and HD Audio services, conversations feels crisp and real
• Dual-mic noise canceling effectively reduces environmental noise to ensure clear calls

HUAWEI TruRelax, TruSleep, TruSeen:

• TruRelax technology analyzes your heart rate trends and stress levels to  take better care of your mental health
• TruSleep monitors different stages of sleep including light sleep, deep sleep, REM stage, and wakefulness
• 24/7 HR monitoring with TruSeen technology. TalkBand B5 tracks and monitors up to 4 exercise modes: running, treadmill running, walking, and riding

Professional Activity Evaluations:

• Apart from recording steps, calories, and distance, B5 builds a running plan based on a Firstbeat calculation and provides evaluations including scores, VO2max levels, recovery recommendations

Remote Shutter:

• The HUAWEI TalkBand B5 also acts as a remote camera shutter. When taking a selfie, a quick touch on the band reduces the blurriness (compatible with EMUI 4.1 or later)

Phone Finder:

• If you forgot where you left your phone, the TalkBand B5 triggers the phone's ringer (even on silent mode) if it's within Bluetooth range

Multi-function Side Button:

• Power on or off the Band
• Answer/Reject/End incoming calls
• Dial the number you last called
• Turn on the screen
• Return to the home screen
• Restart the Band

Technical Specifications:

• Size: 58.2 x 23.3 x 12.9 mm (Device), 44.1 x 20 x 11.9 mm (Headset)
• Weight: Product < 40g, Headset (approx.): 14.3g
• Display: 1.13 inch AMOLED 30ox160 Resolution, Full arc 2.5D glass lens, Touchscreen
• Battery: 108mAh capacity, talk time: (approx.) 6 hours, working time: about 3 days
• Water and Dust Resistance: IP57 rating (The leather strap is not waterproof)
• Internal Storage: 512KB RAM, 16MB flash (external) and 1MB flash (built-in)
• Bluetooth Frequency: 2.4 GHz
• External Port: Micro-USB charging port
• Button: Two release buttons release the headset when pressed simultaneously
• System Requirements: Android 4.4 and above, IOS 9.0 and above