bluetooth specification v1.2 class 2 supports bluetooth headset, handsfree profiles talk time: up to 4 hours standby time: up to 90 hours nominal charging time: 3 hours compatible i.tech 110 ~ 240v ac switching power charger dimensions: 35 (l) x 18 (w) x 12 (h) mm weight: 9.1 grams parallel imported warranty: warranty one year delivery within 2-4 business days