Wall mounted wireless switch remote dual control panel $ 18.07 Product Name: aqara wireless switch (wall mounted single key version) Product model: wxkg03lm (single key) wxkg02lm (double key) Working humidity: 5% - 95% RH, no condensation Operating temperature: - 5C ~ + 50c Product size: 86mm * 86mm * 15.12mm Battery life: standard environment > 2 years