This item, purchased May 22, 2015. Can provide receipt to serious buyers.
https://www.amazon.com/Inateck-Wireless-Bluetooth-Precision-BTSP-10P/dp/B00PFDT07Q/

Like new condition, Decreased battery life, can play music wirelessly for about 2-3 hours. Works with any bluetooth compatible device, including iPhones, tablets, and other smartphones. Comes with batteries. Contact through email, cash only, pick up from Palo Alto. Thanks for looking.