HAND HELD METAL DETECTOR DEALER IN DELHI SGS3003B1 Hand Held Metal Detector Features: ◆. Simple and convenient to use, no adjustment is required. ◆. Three LED indicators: Green-ON; Amber-LOW BATTERY;Red-ALARM. ◆. Low power consumption, can work for 40 hours continuously. ◆. Audio/vibration LED alarm. ◆. Detection distance: Detect a pin at 35mm distance. ◆. Rechargeable battery optional.