assembly kit often used in wildlife rescue can be used in a variety of ways, such as stationary on a post or trunk or directly on the mower Assembly can be done with cable ties or an angle and screws. One device generates a penetrating 2-fold alarm tone, which can effectively sound 5 ha of area. The sound is emitted in one direction only. Please order 9 volt block battery separately. permissible temperature range: -20 °C to 60°C, power supply: 6 - 15 V, dimensions 106x45x106