Otium Wireless Bluetooth Sports Headphones In-Ear Earbuds Sweatproof Earphones Stereo with Mic Bass Noise Cancelling Bluetooth V4.1 for iPhone Android Smartphones SUPERIOR SOUND & NOISE REDUCTION: Otium Bluetooth V4.1 Earphones with noise cancellation and CSR feature offer you a stereo crystal clear sound. Wireless earpiece built-in microphone for hands-free call. STRONG WIRELESS SIGNAL10-meter working distance. You could pair with 2 bluetooth devices at the same time. The headphone battery status will be automatically displayed on the IOS Phone screen. BEST SPORTS PARTNER: This in ear headphones with sweatproof design enhances ear using comfort & earhooks wearing stability, will not fall out and great for running, cycling, driving, gym exercise and other outdoor sports. UNIVERSAL COMPATIBILITY: Otium bluetooth headset could seamless syncing to all Bluetooth-enabled devices, including Smartphones like Apple and Android, Tablets, laptops etc. PLAY TIME AND VOICE PROMPT: Built-in long lasting battery allows up to 8 hours playing time and 240-hour standby on a full charge. Voice prompt allows notification battery low and connected status.