How to Use: Charging method: The instrument is equipped with a rechargeable battery, which can be directly connected to the charger and can be charged, and the charging time is 10 12 hours. Specification: Item Type: Metal Detector Material: ABS, aluminum Host Size: Approx. 28.5 x 16.5 cm / 11.2 x 6.5 in Accessories Size: Approx. 12 x 8 cm / 4.7 x 3.2 in Screen Display Size: Approx. 9.5 x 5.5 cm / 3.7 x 2.2 in Voltage: 100-240V Range: Approx. 1000m / 3280.8ft Depth: Approx. 30m / 98.4ft Host Battery: NiMH rechargeable battery, AAA, 1600MAH (Battery Included) Transmitter Accessories Battery: NiMH rechargeable battery, AAA, 1200MAH (Battery Included) Transmission Frequency: 5.6-6KHz Signal Frequency: 360-440Hz Detection Type: Gold, silver, copper, and gems Charging Time: 10-12 hours Application: Metal finding Weight: Approx. 3367g / 118.8oz Package List: 1 x Plastic Storage Box 1 x Host With Display Screen (Battery Included) 1 x Transmitter Accessory (Battery Included) 1 x Earphone 1 x Headphone Box 1 x Plug Power Supply 1 x English Manual 1 x Accessory Rod.