Replacement battery fits 7 XP Metal Detectors compatible models. Specifications: 250mAh, 3.7V, Li-Polymer. Compatible with: WS6, WSAII, WS audio headphones, WS4, WS5, WSA and 1 more compatible models. Replaces: XP Metal Detectors D088WS-WTUBE. XP Metal Detectors replacement battery designed for Headset devices. Provides reliable power for your device.