Drive:40 mm Impedance:32 OHM Bluetooth version: Bluetooth v4.1 + EDR Power Level: CLASS II Output Power: 30mW Bluetooth distance: 10 meters barrier Frequency response: 20-20000 Hz Operating voltage range:3.0V-4.2V Microphone sensitivity:-42dB with A2DP / AVRCP high-quality stereo audio transmission and remote control protocol Powerful noise noise cancellation circuit(Active Noise Reduction) Wired and Bluetooth automatically switch to support audio input Charging time is about1 hour (power indicator Charging: blue light lights, fully charged: blue light goes out) Dimensions: Diameter length 20MM. Width 15MM. 18mm high Talk time About 6hours Music for about 5hours The standby time is about 3-4 days Charging Power: DC5V Power Interface [the hole] (computer USB port, mobile phone charger,car charger) Compatible: Compatible with Android, Apple,Microsoft, Symbian 99% of with Bluetooth cell phones(IOS cell phone has power display) Brand Samsung SKU 100193023_NP-1020445037 connector_1 3.5MM wireless_connectivity Bluetooth