Wireless Earbuds，Sweatproof Mini in-Ear Sports Earphones，TWS Wireless Bluetooth 4.2 Binaural Sports Bluetooth Earphone Noise Cancelling Headsets with Charging Box for iPhone Samsung
Brand: Alian
Product parameters:
Size: about 23x12x26mm/0.69x0.36x0.78 in
Battery box: length: about 92mm/2.76in
Earphone battery: polymer lithium battery 50MA
Bluetooth version: 4.1
Operating voltage: 3.2-4.2V
Bluetooth frequency: 2.4-2.48GHz
Bluetooth distance: 10M
Speaker impedance: 16Ω
Speaker bandwidth: 20-20KHz
Speaker sensitivity: 105db
Microphone sensitivity: -42+-2db
Audio transmission format: A2DP/HFP/HSP/AVRCP
Binaural talk time: 2 hours / battery duration: 8 hours
Binaural music time: 2 hours / battery duration: 8 hours
Binaural standby time: 12 hours / battery duration: 24h

Battery box parameters:
Battery box battery: polymer lithium battery 400MA
DC charging current: 400ma
DC charging voltage: DC5V

Packing list:
earphone * 1 pair
charging storage box * 1
manual * 1
ear cap * 2 pairs
USB charging cable * 1
【TRUE WIRELESS & SUPER SOUND QUALITY】 Latest Bluetooth with TWS technology on both earbuds, provides faster pairing, stable connection and signal transmission -10meters no-obstacle range. Noise cancellation technology reduces ambient noise and echo, enable clear sound no matter in calls or when listening to music. Truly Wireless Earbuds set yourself free from cable mess.
【COMFORT ERGONOMIC DESIGN】Super lightweight (ONLY 0.18oz), Ergonomic Design provides long time comfortable wearing. IXP5 Sweatproof, Anti-sweating while running,hiking and exercising. 2 premium soft smooth silicone caps to fit your ears perfectly for maximum comfort. Soft material to protect ears from the long phone calls and music time.
【PORTABLE LONGER BATTERY LIFE WITH STORAGE BOX】Equipped 400mAh battery in the portable magnetic charging box, which can support 4-5 times fully charging for the wireless earbuds. Never worry about low battery when you are out all day. And each earphone has Built in 50mAh lithium polymer battery, enjoy about up to 2 hours of premium quality music playtime or talk time after fully charged.
【SMART STEREO MODE AND MONO MODE】 The earbuds can be used dual or separately as you wish, which means you can share the same music/movies with friends and enjoy the clear stereo sound by using both headset. But only the master headset (Left headset) has sound when at the calling mode, this safety feature allows you to hear the traffic while driving.
【MULTIFUNCTION ONE-TOUCH OPERATION】 One-button design to answer/end calls, play/pause music, play next song, pretty easy to use. Our headphones are compatible with all Bluetooth-enabled IOS Android devices, such as iPhone, Samsung, Huawei, and other Smartphones etc.