Check the listing for details. Garrett Z-Lynk Wireless System Transmitter and receiver with 1/4 headphone jack. Condition: New. Listed at 140.95 USD. Garrett Z-Lynk Wireless System. Transmitter and receiver with 1/4" headphone jack connector. Use your favorite land headphone with 1/4" plug and go wireless! All the benefits of using headphones, without being tied to your metal detector. Nearly universal; designed to work with most metal detector brands and most wired headphones. Note: Z-Lynk Wireless System requires use of headphones with a 1/4" headphone jack (not included). Key Features Freedom—all the benefits of using headphones, without being tied to your metal detector. Lightning-fast speed—Near-zero delay (17-milliseconds) from your detector to your headphones. Six times faster than Bluetooth speed, and up to four times faster than other wireless headphone kits. Versatility—Nearly universal; designed to work with most detector brands and most wired headphones. Frequency-Hopping Technology—Creates an infinite number of channels to prevent interference with nearby headphones and wireless devices. Extended Hunting Time—Get up to 30 hours of operation per charge. Recharge the Z-Lynk modules with any micro-USB charging port—on your laptop, in your car, or with a USB power block such as a smartphone charger. Can be used on both VLF (single frequency) and pulse (multi-frequency) detectors. Additional Info: Recharge the Z-Lynk transmitter and receiver modules with the supplied cables by attaching them to a laptop, your vehicle’s USB port, or a phone charger’s USB power block. Each module has an Auto-Off function that will switch off power after 30 minutes of inactivity. Specifications Speed: 17 millisecond delay (6 times faster than Bluetooth) Operating Frequency: 2.4 GHz band frequency hopping Environmental: Water resistant; do not submerge. WR-1 (receiver): IP 52: protects against light rain. WT-1 (transmitter): IP 64: protects against heavy rain. Battery type: Rechargeable Lithium Ion Charging: Micro-USB charging port (cables included) Operating time: 30 hours per charge (approx.) Warranty: 2 years, limited parts and labor Certifications: FCC, CE, IC Operating Temperature: -20° (-4° F) to 60° C (140° F)