nearbyexpress1 1. Bluetooth version: Bluetooth V2.1, compatible with V2.0 and V1.2 2. Chip: CSR BC6 3. Transmission distance: 10M(Class 2) 4. Frequency.4GHz 5. Stanby time: 90 hours 6. Talk time: 5 hours Link hidden: Login to view Link hidden: Login to view