bluetooth specification v1.2 class 2 supports bluetooth headset & handsfree profiles rechargeable 120 mah li-polymer battery talk time: up to 6 hours standby time: up to 150 hours nominal charging time: 3 hours compatible i.tech 110 ~ 240vac switching power charger dimensions (main body): 45 x 18 x 23mm weight: 16.7 grams parallel imported warranty: warranty one year delivery within 2-4 business days