User's Guide

Human bodies or containers of liquid positioned between the host and
the CHS.
The presence and activity level of competing Bluetooth or 802.11
(Wi-Fi) systems using the same 2.4 GHz frequency.
Metal in a grid pattern, such as chain link fencing or chicken wire. This
type of material may block the Bluetooth (or Wi-Fi) signal completely.
62 | APPENDIX A: SPECIFICATIONS