1PLASTIC MATERIAL: Thick engineering plastic material, strong and durable, providing a long service life. 2ONE KEY CONTROL: The operation is simple, only one key can be turned on and off, and it is easy to use. 3ALARM MODE: One key to switch the alarm mode, the alarm can be switched freely, convenient and fast. 4DOUBLE ALARM: Double alarm device, sound and light alarm and vibration alarm, it is not easy to lose the alarm problem. 5POWER SAVING: Long lasting battery life and more power saving, can work continuously for more than 40 hours, the voltage drops to 6V, and the detection distance remains unchanged. Item Type: Cow Stomach Metal Detector Material: Plastic Diameter: Approx. 13.8cm / 5.4in Length: Approx. 35cm / 13.8in Battery Type: 1 x 6F22 Dry Battery (Battery Not Included) Purpose: Metal Detection for Cow Stomach 1 xCow Stomach Metal Detector (Battery Not Included) 1 xUser Manual Please allow some errors due to manual measurement.