Style: In-Ear Communication: Wireless Connectors: Inductive Use: Portable Media Player Function: Microphone, Noise Cancelling Pen Color: Black Build-In Quad Band GSM Module: 850/900/1800/1900 MHz Ink: Black/Blue Distance To Earpiece: Base on earpiece Support Micro earpiece: All elect micro earpiece Material: Plastic Anti-detector: NO Battery: 400 MAH Size: 150*14.7*14.7mm Taking Time: 6 h Show More