Compatibility: All phones Dimensions: L(20mm)*W(15mm)*H(18mm) 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 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) Talk time About 4 hours Music for about 2 hours 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 No Brand SKU 100826515_NP-1021338691 Model S-530 Ultra