Groupon: True Blue Voice Bluetooth Headset M21 at Rs.399 [lowest online]

http://www.groupon.co.in/deals/shopping/True-Blue-Voice-Bluetooth-Headset-M21/380636

Features:

• Provides clear sound
• Bluetooth standard: V2.1
• Talking time: about 4-5 hours
• Range: within 10 meters
• Standby time: about 100 hours
• Supported profiles: Headset, Hands-free
• Security: Encrypted Link
• Charger AC Power: 110V-240V D C output 5V
• Lightweight: Less than 23g

PRICE COMPARISON:
Infibeam - Rs.549 [OOS]
http://www.infibeam.com/Mobile_Accessories/i-True-Blue-Bluetooth-Headset-Voice/P-E-MA-True-Blue-tbv-m21.html