Features Li-Poly battery built inside shell For 60M/200f under salt water operation Ribbed and ergonomic body Easy to use two buttons control Lost alarm Lanyard attachment loop cap Target locking function LED flash light Specifications Protection: 200FT / 60M under fresh or saltwater Dimensions: L 16.5″ / 42CM, W 3.9″/10CM, H 2.4″/ 6CM Weight: 11.6oz / 330 gram Coil: 5″x4″ / 13x10cm mono coil Battery: Built in 3.7V 500mAh Li-Poly Battery Working Method: Pulse induction. No falsing in saltwater and black sand environment Operating Frequency: 95 kHz Tuning: Automatic Indicators: Audio / Vibration LED Beam Lights Response will be intense when probe close to objects Controls: Power switch (On / Off) Mode control(Vibration/Buzzer/ V+B) LED flashlight (Once power on) / Two control modes: snorkel dive mode(0~8M), dive mode(8~60M) Includes MicroUSB Cable to recharge the unit Belt Clip Lanyard