WALKIE ONE  |  CONCEPT 5.2  |  REVISION R5
External envelope and control locations
Millimetres. Nominal reference dimensions. STEP controls geometry. Prototype DFM and fit review.
2026-09-04  |  Rapid Product Solutions  |  Physical fit and material grades require confirmation.
1 / 2
88 body width
136 body height
FRONT  +Z
27.2 depth
RIGHT  +X
Body 88 W x 136 H x 27.2 D
Corner radius 26 in plan
Face edge radius 5
Rigid center faces Z +/-13.2
Rear seam Z -9.0 / -9.3
Play key diameter 34
Play key center X0 Y-38
Light output X0 Y-13
Mic X0 Y-18.25; dia1.8
Volume centers Y30 and Y5
PTT center Y10; height 58
USB center Y-32.139 Z-4.740
USB passage 15 Y x 10 Z
Flared mouth 17 Y x 12 Z
Mic edge gaps 1.85 each
R5 retains the offset USB socket. Centering it on the volume keys requires a verified internal connection.
Side keys extend beyond body width; see measured envelope in handoff.

WALKIE ONE  |  CONCEPT 5.2  |  REVISION R5
Hardware placement and inspection features
Millimetres. Nominal reference dimensions. STEP controls geometry. Prototype DFM and fit review.
2026-09-04  |  Rapid Product Solutions  |  Physical fit and material grades require confirmation.
2 / 2
FRONT PROJECTION OF INTERNALS
Green: populated PCB envelope
Yellow: battery body; grey: 40 mm speaker
DEPTH STACK AT BATTERY
Rear hard face
-13.20 to -11.20 mm
Antenna seat
-11.20 to -10.40 mm
Antenna including feed
-10.30 to -9.95 mm
Populated PCB
-9.30 to 0.20 mm
Battery tray
0.70 to 1.50 mm
Foam under battery
1.50 to 1.70 mm
Battery and protection
1.70 to 10.10 mm
Front hard wall
11.20 to 13.20 mm
Battery center Y5; 1.1 mm headroom above protection.
This is a design allowance; cell swelling specification remains open.
Rear antenna to PCB envelope: 0.65 mm minimum along Z.
Speaker X0 Y43.5; Z5.4 to Z10.4; ears along X.
Gasket: Z10.4 to11.6; 1.5 mm free / 1.2 mm installed.
Four rear screws at X +/-34; Y -44 and +46.
M2.5 x 10, 90-degree countersunk; head diameter <=5.0.
Finish 2.8 clearance and 2.1 pilot holes; tap M2.5 x 0.45.
General target +/-0.20; finished moving fits +/-0.10 mm.
Targets require RPS agreement; they are not process guarantees.
Verify wiring, connector insertion and foam preload on hardware.
