Battery life: eight hours talk time and up to 200 hours standby from a full charge. Size: 5cm x 3cm x 2cm when folded Weighs 20 grams (0.07 ounces). Unique foldable boom mic to easily connect/disconnect calls Can be worn over either ear; the volume control remains in an upward position. The HS850 has Bluetooth software version 1.2 which is also compatible with Bluetooth software version 1.1. Bluetooth version 1.2 connects to devices faster than 1.1 and offers adaptive frequency hopping, which decreases interference from other electronic devices, especially WiFi.