* bluetooth specification: v2.1+edr class 2 * built-in fm radio with oled display * bluetooth profiles supported: headset, handsfree, a2dp and avrcp * range of frequency: 2.4ghz spectrum * nominal charging time: within 3 hours * talk time: up to 7 hours (radio playing time included) * music playing time: up to 7 hours * standby time: up to 150 hours * dimensions: 53 x 24 x 26 mm * weight: 21.5 g parallel imported warranty: warranty one year delivery within 2-4 business days