bluetooth specification v1.2 class 2. supports bluetooth headset, handsfree, a2dp and avrcp profile. 3.5mm audio jack for customized headphones. remote control feature. swap between quality stereo and mono sound. uncomplicated single button control. adjustable volume. rechargeable 250 mah li-polymer battery. compatible i.tech 110 ~ 240v ac switching power charger. talk time: up to 6 hours. music playing time: up to 6 hours. standby time: up to 150 hours. 55 x 24 x 27mm in size for the main body. 20g in weight. available in 2 different colors, white and black. parallel imported warranty: warranty one year delivery within 2-4 business days