Features: 1. 1005a connet all ipod devices with 30 pin connector to stero Hi-Fi. 2. 1005b connecter all ipod devices with 30 pin connector to power amplifier with 3.5 jack. 3. 1005c connect all ipod devices from the earphone jack to stero Hi-Fi. 4. Uniqe retractable design, Compact size for traveling convenience. 5. Directly plug and play for any megaphone. Specifications: 1. Net weight: 50g 2.Length: 4.5 inches( Max extension length: 32 inches.