Canon 1305B001 WD-H37C Wide Converter Lens for HF10, HF100 & HR10 Camcorders Up to 15 hours of talk time and 400 hours of standby time Supports Car Handsfree (Unidirectional microphone) and Speakerphone mode (Omni-directional microphone) High performance built-in speaker and dual microphone OLED display for caller ID (display automatically reverses orientation when device is used upside down) Senses vibration of car and connects automatically to phone when engine is switched on