Nokia BH-905i. Wireless range: 10 m, Bluetooth version: 2.1+EDR, Bluetooth profiles: A2DP, AVRCP, HFP, HSF. Ear coupling: supraaural, Headphone frequency: 15 - 20000 Hz, Impedance: 32 Ом. Battery technology: Lithium-Ion (Li-Ion), Talk time: 24 h, Standby time: 600 h. Dimensions (WxDxH): 190 x 140 x 35 mm, Weight: 167 g. Compatible products: Nokia 3109 classic Nokia 3110 classic Nokia 3110 Evolve Nokia 3120 Classic Nokia 3500 classic