Uniden DRX100 Dect 6.0 Accessory Range Extender for Landline Wi-Fi Friendly Compact Size Add up to 2 DRX100 Range Extenders per system to double the useful range of the cordless handsets in your system Works with Uniden D1660, D1680, D1685, D1688, D2280, D3280, D3288, DECT3080, DECT3181 series phones Compatible with the DECT4066, DECT4086, DECT4096 and WXI3077 phones