Product name Gold Dream Neckband Bluetooth Earphone Model no. X3 Bluetooth Version V5.1 Voice prompt support Transmision distance 10meters Battery Box Capacity 400mAh Music time 50 hour Frequency response 20hz- 20khz Good sound Bass & clear voice Delivery available over all in Nepal cash on delivery online payment 9863060759 - Mahabouddha, Ason. wholesale and retail.