ITEM NAME:E260 Wireless Sweatproof Bluetooth Earbuds Sports Stereo Earphones with Mic #SFD Product Description Description: E260 Wireless Sweatproof Bluetooth 4.2 Earbuds Sports Stereo Music Hook Headphones Earphones with In-Line Microphone Features: 1. Unique Ear Hook structure, perfect fit for the ear. 2. Waterproof and sweatproof, Good companion for outdoor sports. 3. Ergonomic design, close fit, not easy to fall. 4. Bilateral stereo sound, shocking sound. 5. Volume adjustment, song switching, call answering, multi-function. Specification: Brand: Neutral Bluetooth Version: V4.2 Frequency Response Range: 20-20KHz Working Distance: 10m/32.81ft Impedance: 16ÃŽ © Sensitivity: 100dB  ± 3dB Plug: DC 5V Battery: 3.7V 50mA Working Temperature: -40 °C-80 °C Life Time: ≠¥ 4H Standby Time: 120H Function: Volume Adjustment, Song Switching, Call Answering/Rejection, Bluetooth Playback, Power Display, Intelligent Shutdown Product Size: 100 X 100 X 5mm/3.94 X 3.94 X 0.2" Packing Size: 120 X 120 X 10mm/4.72 X 4.72 X 0.39" Net Weight: 20g Gross Weight: 80g Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 1 X Bluetooth Earphones.Included: 1 X Bluetooth Earphones. Bluetooth Version: V4.2. Bilateral stereo sound, shocking sound. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.