Features 1、Suitable for AKG K121 K121S K141 MK II K142 HD headphones. 2、Enhance the bass performance of the headphones, let you enjoy the music. 3、Made of high quality soft and comfortable cotton material, durable and flexible, easy to listen to music. 4、A replacement for the previous old one or damaged ear pads. 5、Easy to install, just need to remove the old and install the new one. Specification Description: NFC is a popular technology in recent years. We often heard this work while smart phone company for Samsung or for HTC introduces their latest high-end phones. Almost all the high-end phone in the market support NFC. Near field communication (NFC) is a set of standards for smart phones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimeters. For electronics geeks, we also want to use NFC technology to make our own things. So we build this NFC module for RFID. This module is built around NXP PN532. NXP PN532 is very popular in NFC area. And the company offers much technology document to help developers. We developed this module based on the official document. And to make things easier, we also build library for this module. Features: Small dimension and easy to embed into your project. Support I2C, SPI and HSU (High Speed UART), easy to change between those modes. Support reading and writing for RFID, P2P communication with peers, NFC with phone for Android. Reader/writer for RFID supports: 1. 1k, 4k, Ultralight, and DesFire cards; 2. ISO/IEC 14443-4 cards such as CD97BX, CD light, Desfire, P5CN072 (SMX); 3. Innovision Jewel cards such as IRT5001 card; 4. FeliCa cards such as RCS_860 and RCS_854 On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI Specification: Size: As the pictures show Package Weight: Approx. 20g Quantity: 1pc Package included: 1 x PN532 NFC Module for RFID 1 x 2.54mm spacing 4pin Cable 1 x One S50 White Card 1 x One S50 Key Card 1 x 12P bended male pins Note: 1. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List