This is the VoltWatch2 on-board Receiver Battery Monitor for 4.8V and 6V NiCd and NiMH receiver packs. so you can see at a glance the status of the receiver battery mounted inside.
FEATURES: 7-LEDs provide instant, accurate battery voltage status of Low, Safe, or Max. Only one LED glows at a time Small switch to select 4.8V or 6V battery Very lightweight, only .15oz (4.3g) unit Draws amazingly low current.
INCLUDES: One VoltWatch2 On-Board Receiver Battery Monitor. One 1.5"x1" piece of double sided mounting tape
REQUIRES: Plugging into any unused receiver port Mounting with double-sided tape
SPECS: Length: 1.65" (42mm) Width: .63" (16mm) Height: .16" (4mm) Weight: .15oz (4.3 grams) Current Draw: approx 4-34mA Lead Length: 198mm (7.79")