Nokta Makro Simplex+ Waterproof Metal Detector with 11" DD Coil Main Features IP68 - Waterproof Up To 3m (10ft) Wireless Audio Ready, Wireless Headphones are an optional accessory Built-In Rechargeable Battery Lightweight (1.3kg / 2.9lbs) Shaft Retracts Down To 25". Great For Easy Transport, Storage As Well As Diving! 11" DD Coil Product Specifications Easy to Use Single Menu Design Search Modes - All Metal / Field / Park / Beach Iron Volume Notch Discrimination Frequency Shift Vibration Online Firmware Updates Fabulous Lightning for Night & Underwater Use – Backlit keypad / LCD & LED Flashlight