Hosmart was founded in 2012,Our vision is to create a global world leader in home security solutions and products. We have designed these systems to make homes smarter, safer, and easier for those people to live in their homes securely and with confidence. Easy to Use - The speaker volume on the parent unit is easily controlled by pressing the up or down arrow keys. Number of channels: 1 Special feature: Rechargable Tuner technology: UHF Water resistance level: not_water_resistant Included components: cable, rechargeable battery