Amazon.com: Sony WH-CH520 Wireless Headphones Bluetooth On-Ear Headset with Microphone, Black New : Everything Else
The Walkman Blog: Sony WH-CH520 coming soon to replace WH-CH510 (update 2)
Amazon.com: Sony Wireless Bluetooth Headphones - Up to 50 Hours Battery Life with Quick Charge Function, On-Ear Model - WH-CH520W.CE7 - Limited Edition - Matte White : Electronics
Amazon.com: Sony Wireless Headphones WH-CH510: Wireless Bluetooth On-Ear Headset with Mic for Phone-Call, Black : Electronics