The Somfy Telis 1 RTS Patio Remote (1 Channel) provides handheld control of one Radio Technology Somfy (RTS) motorized device or one group of devices up to 65 feet away. With water and shock resistance this remote is ideal for use in outdoor environments or children's rooms. Specification: Radio Frequency - 433.42 MHz. Color/Finish - White and Blue. Protection Index - IP44. Battery Voltage - 3 V. Battery Type - 2430 Lithium Working Temperature - 32 to 140 degrees F.