Elecom 11312. Wireless range: 10 m, Bluetooth version: 2.1+EDR, Bluetooth profiles: A2DP, AVRCP, HFP, HSP. Ear coupling: intraaural. Battery technology: Lithium-Ion (Li-Ion), Standby time: 150 h. Weight: 40 g. Continuous audio playback time: 5 h, Input voltage: 5 V, Input current: 0.15 A