Check the listing for details. SMART WC6-R1 Wireless Bluetooth for SMART Board Interactive Whiteboards (SB640,. Condition: Seller refurbished. Listed at 34.99 USD. SMART WC6-R1 Wireless Bluetooth for SMART Board Interactive Whiteboards (SB640, SB660, SB680, SB685, SB690) Included with your purchase: 1- Smart Bluetooth Adapter WC6-R1 1- Power Adapter 1-Quick installation instruction Bluetooth 2.0 industry-standard wireless technology and USB only interface 56-bit encription support. Bluetooth security is built into the paired components. 2.4 GHz ISM band Gaussian Frequency Shift Keying (GFSK) with modulation index (bandwidth-time product, BT) Frequency Hopping Spread Spectrum at up to 1,600 hops/second amongst 79 channels, spaced at 1 MHz separation 721 kbps speed Class 2, 2.5 mW, 4 dBm with a typical range of 30' (10 m) -80 dBm at 1e-5 BER Red and green LEDs at both ends indicate link status 41°F to 95°F (5°C to 35°C) with up to 80% humidity non-condensing 6 Months warranty