Flipkart Sale - Purchase Flipkart SmartBuy 3W Bluetooth Speaker worth Rs.1199 at Rs.319 Only. Party anytime, anywhere with this Flipkart SmartBuy 3W Bluetooth speaker. Connect it with your smartphone, tablet or laptop and play your favourite playlist in a high-quality, crystal-clear sound. That’s not all, this speaker is powered by a 300 mAh battery and offers up to 5 hours of playback time.